Buddy, if you're getting 26 pounds of thrust I wouldn't care what the rpms are! If you want to 3D then thrust is the number you want to look at. The more you have the better it is and if you can get to a 2:1 thrust to weight ratio you are awesome!!! Doesn't matter if you're turning 5000rpm as long as that thrust number is up there and it spools up fast!! BTW Don't load the engine too much trying to get there. Bad thing!! I'd say you're just about right with that Xoar at those rpms.