The 131 mph was not theoretical, was on radar. But this is how I did it. Went to a high split S, hammered the throttle all the down then cam across the field.
All I'm really trying to say is it's hard to beat the Gremlin for a $35.00 plane. I beef up the front ends of my Gremlins. I put plywood under the fuse where the motor mount is and cover the front in epoxy, sheet w/ fiberglass.
Happy flying
Dan