I am building these to concurrently and don't have any real issues but i did incorporate Kevlar in to the shockcord system other than the following:

Patriot:

I was wondering WHY the instructions do not have you "round" the leading edges and leave the fins square?

Patriot & Hi-flier: fins don't touch the pad and only the motor retaining clip; does this add weakness to the motor mount over time?