Need quick help - motor decision 7xl or 8xl? (9xl?)

[Sylvester]

Id say , go 8xl, for 14 or possibly 12 cells as stated, would be good torque speed and runtime, and if you want to go 9xl you have to wait, cause they are out of stock! The 7xl will not give you too good of runtime, and if you go up to 16 cells, the 8xl will be a perfect motor for that cell count!