I think they stopped pre-hinging the surfaces. I may be wrong. My Superstar did not have the pre-hinging done.
Did your new Edge come with the new hardware too ? I really like the carbon fiber push rods and metal linkages they include now.
Seagull is putting these new large planes on a diet and an OS160 or a big Saito 150 thru 220 will hover them easy. The new Edge and the Superstar come out around the same weight, etc.
My Superstar hovers at 3/4 throttle or less with the Saito150. I can just imagine what a small gasser or a 160 would do. Let alone the big SA220.
I think they would fly great with a Saito 120 as well. You'd just be limited on 3/D stuff.