Look again. A ST .75 is 20 oz without muffler & 27 oz with. I make that 12% heavier than the .76 GWS and only 4% heavier than the Tower .75

That's a far piece from 100% heavier (2X)

I can't think of any of the 40 members in my club that fly a GWS or Tower engine. O.S., SuperTigre, Thunder Tiger in the glow two strokes. Rarely others.

Check out Kangke/SuperKraft if you want cheap. I'm still tryng to get mine to run right after two years of trying. Cheap engines can be a misery and we do this stuff for fun.