...probably it's not a big surprise, but I've just tried to upload v3.8 surf scheme that doesn't require 'TestStuff', adjusted with 60 seconds turn-time (surf+fly+w2w), but the same scheme may be used for surf only (turn = 30 sec), or surf+fly (turn = 45 sec) - now, is there something wrong with the scheme file itself or the board's engine just isn't ready for this yet?