I tried it and the better 40PS in FAI F3D Pylon competition racing. The best that could be said was that is was an also ran.

Now I did have some luck with FAI F2A and AMA CL precision aerobatics by changing the P&L and adding a venturi insert. I would think its value more in the $50 range. I was getting ST40X for less than $100 when the Nelson came out.

All the best,


Konrad