I need to replace my lower housing on an Alpha One with one I bought on e-bay. The guy said he spun the gears in the upper. Is there any way I can flush the lower to make sure there's nothing in it that shouldn't be (like metal shavings)or do I need to tear it apart to make sure. I don't want to install it find out later there were shavings in it!<br /><br />Thanks for the help.