RE: OS 1.60FX vs OS bgx-1 3500
So far I've used only an 18x6w apc. I only have about a dozen or so flights on it so I can't really make a reliability claim just yet. I can say however that when I changed from med. size tubing to large she ran a whole lot better. I have not tached it yet but I would guess a little over 8000 rpm.