I'm sure you would, Drew. Doesn't sound like your other boards lend themselves to light to 7.0 winds. This would fill your bill. Have to sympathize, though, as the Carves (Konas) are really pricey.

If you find a used Kona 11'5 single fin in decent condition, I'd get it. John Ingebritsen was worried that I would "ruin" my Kona with the side-biters, but I wasn't worried. After 20 years, I'm pretty good with repairing fiberglass....

But Tooold is way better than me on the paint jobs!

Ok, thanks for explanation. So some advanteges are found in the us box for (Was)sup planing mode, even if I don't know if in RRD this was made on purpose, as it seems that they didin't think it as a planing board, as far as I know.
On the opposite with a Powerbox you'd loose the forward adjustement, but you could use a 50 cm fin with a 9,0 sail and get the best from the board in lightwind, so if you've noticed a step up from the sup fin to a big and wide one, next to the box limit, imagine how imho it will perform with a dedicated slalom fin in flat-water. Ok sorry, this has to be told to mr. Ricci...
Nice to hear so good planing attitudes of the Wassup, I'm gonna sent the link to this thread to my friend who has and enjoys a Wassup too. And pheraphs to mr. Ricci, two years ago I was thinking at a Wassup but their answer stopped me...

Er, uh, one reason I like adjustability in center and side-bite fins is the use / need for weed fins.

For a wave board, even for soft mushy waves, I think adjustability is worth it. The physics of surf sailing is still somewhat shrouded in mystery, and if so, having a single fixed position on fins is not the best plan of attack. There needs to be room to maneuver. Even if you end up always using the same settings, the ability to improvise is important.

I don't see much disagreement between us. I'm only saying that versatility can end up being helpful....you don't seem far form that.
Clarify where I'm missing the point,

Waves and surf sailing is where the K 11'5 shines. For my 75 kg, I find it perfectly sized in fresh water (haven't ridden it in salt water). So I suspect a bigger sailor would find marginally small (especially in fresh water or for sailors >90-95 kg in salt water). Someone <65 kg could probably use it as an SUP, but it's not an SUP.

BTW - one can ride it when the wind in the low 20's, since it is a longboard and thus has excess stability. But it's really not nearly as much fun as a shortboard once the wind is up. So from vwman's specs, it's not a good board for his purposes, I agree.

I have to put my vote in for the Amundson 11'3 SUP which I think windsurfs really well. It definitely planes-longboard style- as long as you replace the stock fin with a longer one. I use a 29 cm/11.5 inch all terrain fin. What do you guys think of  these 11'2 or 11'3 SUPs that windsurf compared to the kona(now Exocet) 11'5?---along with Amundson, Thommen makes one as does Starboard. I saw a Sean Ordonez 2011 SUP that was around 11'2, but I couldn't see mast foot screw in photo. These boards definitely SUP better than the K 11'5, but I was wondering if any of you had compared their windsurfing ability, in waves and in flat water.....

I have sailed the 11'5 & 10'5 Konas here in the Gorge - just river swells & the Amundson 11'3. They are really night & day. The Amundson paddles much better of course & has that longboard glide with a sail. It actually goes upwind really well on the rail & turns nicely on the swells. It has a very lively subplaning feel & is really fun to ride. The Kona's are true windsurfing boards though. While not having quite as much of that longboard glide, the performance on a plane is in another league. It really feels like a fast freeride while on a plane & the full planing maneuverability is nothing short of shocking - even on Gorge swells.

I would say if your priority is windsurfing & you want the ability to plane at high speed & sail in the straps then the Kona is the way to go. If you want to SUP & you want a more longboard glidey feel for mostly subplaning sailing & gliding about in the surf, then the Amudson is a great board. One caveat is that I have seen a few Amundson mast plugs rip out - so they are not made for serious powered sailing.

"Dry" means that there was not enough epoxy to fully fill the interstices (spaces between fibers) of the fiberglas / carbon cloth. In effect, this means there is inadequate bonding between the fibers, because there is no epoxy between some of the fibers - nothing to bond them together. It is sloppy build, skimping on epoxy by not fully "wetting" the cloth (i.e., saturating it with epoxy before slapping it together in the mold). There are other lay-up flaws that I won't elaborate on here, but that is the meaning of "dry".

I'll agree with Caleb that the K 11'5 is a windsurfing board. It'll show you some glide in waves with light wind, fun for that, but when the wind picks up it'll go. Longboard style of "go" - kind of bounding over waves and swell - but it'll go, planing into and out of jibes. Of course in flat water it likes broad drawn out affairs (long outline, overhanging duck tail). In waves / swells, it'll slash and carve pretty neatly - not like an 85L FSW, but better than you'd think. Real fun.

I've sailed SUP's that I thought were going to break in half once I got them planing, feeling all the board flex. You can feel the K 11'5 flex, but it's a solid board.

I have little doubt that a good surfer / SUP'er could show us a thing or two on the K 11'5. If Robby could loop an Equipe, Kelly Slater could barrel roll a K 11'5, I've no doubt. But I agree with Caleb, if you're not quite that good, and SUP is your main mode, I probably would test ride the K 11'5 but it's probably not your thing. If you want to surf sail (gliding), plane in the surf, and maybe do a little paddling on complete no-wind days...and do all of that with just one board, the K 11'5 would be a compelling choice.