KB7 said..
If you have an Armstrong foil get the Armie board
.I'm 85Kg and use the 75L Version which sinks about 10cm but it's very stable underwater and comes up on foil easier than my old 90L . I would recommend anyone who is good at getting up on foil and makes most gybes to go negative 10 with these new boards. The reason you want the Armie board is track position. My friend has the new Fanatic TE 85L when we match up the rear of the boards my foil is 150mm forward of his which is way forward of the Fanatic boxes.
This is important to get the perfect balance which for me is a very slight positive front foot pressure. Once you get it right the board feels weightless on the water it's weird it's feels much smaller almost like riding my old kitefoil board.
The concave deck is very comfortable and foot-strap position is perfect . It's also made pumping easier due to the perfect balance and the front bounces back up if you touch down while pumping.
The Fanatic TE is a very nice light board but if you already have the Armstrong foil it's a no brainer.
The comment t about the weightless feeling is spot on. I'm at the -5L sizing and I recently had the best session with the 925 dialed for the conditions and it was so light and reactive it felt like my tiny prone board.
My friend is looking at them as well and he complains about the non surfy look of them and is hung up on the length instead of volume. The proof is in the pudding when you ride them though. Seriously nothing I can complain about design / quality wise.