if you do go that route, make sure u wire them up the right way, as if not the main fan will stall when it kicks in...and u'll have overheating issues,.
The wiring on them is usually blue and black, howver it seems to be hit and miss to which ones are wired to the + and - in the housing..
So u may have to wire them up black to brown and blue to red, and if you get issues just swap them over...