Heh. You haven't done it in the Spit I. So far as I can tell - and I have extensive experience! - there is no recovery from the Spit I's inverted spin.
- oldman
The problem with the in game spit 1 is CoG,try dropping the gear and applying full forward stick. This should get the nose to come down,if inverted and help you regain control. Of course you need some alt to work with,under 2k above ground level and it’s too late.
YMMV.