Aquaclear smaller motor compatable on 110 model?

Hey guys I was wondering if anyone knows if the aquaclear 110 model case is compatable with any of the smaller aquaclear model motors or do I have to just buy the 110 motor and change impeller. I know that the 110 is a bigger motor and i assume the hole in the case for it is larger but maybe not.

I am setting it up as a refugium and I don't want the 110 motor because that's a little too much flow and it seems a waist to buy a 110 then toss the motor or buy the 110 and a new impeller. It would be nice just to buy the shell and a smaller cheaper motor if it will fit.

Thanks