With how many different foil kits there were for a while, and many different hybrid/dedicated boards, seems like there have been a lot of different setups that work.
Here's something that seemed really silly to me and I almost didn't try. I had my 8.0 cheetah rigged because it was windy enough to fin, and I wanted to try using my select carbon slalom fin instead of a weed fin, as the weeds were actually tame. The difference was amazing, and I forgot what a real upright fin felt like on my Blast. The wind dropped off after an hour, and I had my freestyle 115 with me (and ptm 926), so I figured I would try it.
An 8.0 seems ridiculous. Normally I limit myself to the 7.0 foil glide, which is a bit difficult to uphaul on this board at my weight (over 95kg at the moment...), but very nice for light wind freeride. I have tried the 7.5 gator on it, but never the 8.0. It just seemed to big. But, it was rigged, I didn't have my foil glides (I mistakenly thought it would be windy enough for my freeks...yet again), and I didn't want to unrig just to rerig my 6.7 blade.
Well, it turns out it worked. I put it well forward of where I put the foil glide 7 or the freeks, because it's got a center of effort further back. I uphauled it once, sinking like crazy, but other than that just waterstarted when I fell in. It felt a bit awkward to pump, but it didn't need a whole lot of pumping. I think it would gust sometimes up to 15kts and I didn't feel like it was too out of hand, but I definitely felt the mast flex and the sail twist a lot compared to the foil glides. To sheet in I ha to move right out on the rail on both feet, which really put me outside of the straps. Jibing felt a bit awkward but it was sorta doable for my skill level.
Figured I would share it because it was kind of funny and a moment of desperation when I didn't have the ideal gear with me. A buddy got a video of me doing a side by side and jibe that I had a big touchdown on but kept going:
