Dave always gives sound advice... You could run a MACS pipe and boost performance quite a bit, but they are like $70 bucks yes? Plus the hassle of setting it up, and retaining it on the airplane (wing saddle area-) I bet you can find a decent engine in the swap-shop for under a hundred...
I agree the Zingers are good props. also---
The only MA prop I used came from Daves recommendation and guess what? He was right... Generally I like APC's though
I sold my OS-50SX and put my Jett-50 back on my Patriot where it belongs--- My other one uses the Webra-50GT and scoot real nice!