ORIGINAL: MIXMASTER
The F 100 X is 10lbs with OS 108??? I hope you meant the old F 90! I have Saito 1.25 on order,if its 10 lbs, I will need the 150 for sure!
Exactly, that is why I say the SA125 is not the best motor for the typical F90.
Sounds like they moved the wing back a bit on the 100x to move CG forward. Should come in a bit lighter with C.F. stuff, but I think with H9 there is a good chance you could get a light one or a heavy one.
I say get the airframe, weigh it and then decide what you are going to power it with.