RE: a 13 pound plane with an os 91fx engine ?
Like he said!
A bigger 2 stroker is in your future if money is problematic.
At worst sell the .91 FX and you'll be able to purchase the larger Supertigre outright with the proceeds.
Just remember that the ST may need more TLC to get tuned up properly.
That said, deadsticks are trivial on your Stik.
I've NEVER worried when my engine has deadsticked ( usually after long blenders started from high altitudes, there's that uncovered clunk problem again! )... Even from a low altitude the GP stick floats in for a LONG time.