Rcman4life -
I agree with the info that mkirsch is giving you. He obviously knows his stuff.
I live in the Phoenix area and was wondering where you fly your parkflyer. I have designed and built a 280 size parkflyer and so far the only place I've been flying is rather small.
You can contact me thru private message or email if you like. Would be glad to help you also if needed. I am an experienced model designer, builder, and flyer.
feihu