the loader replaces the rock grate. the only real downfall i can think of is that it doesnt block crap from coming in the pump as good as a stock grate. but if thats really a problem than you need to be a little more careful of where you're starting up and running your boat. talk to a reputable pump shop about your setup and plans and they can recommend a loader for you. dont just buy a cheasy one out of a catalog
and watch for beach towels, sorry mike------bandwagon