Is there any use for the stock 650's after upgrading? I'm trying to make sure I understand you guys 1100's in the rear 700 stock in the floor 500 IBS upfront....and on top of that you guys add 400's to the rear seats. This extra 400lbs in the rear seats would be unnecessary if I have a few fat ass friends with me, correct? The weight capacity is 2500lbs so if I add 4200lbs ballast ( minus the 2500lbs standard stock ballast) 2500LBS boat weight capacity minus 1700 leaves me with 800lbs for passengers. Sorry if this is confusing. I'm just trying to figure this all out before I pull a titanic on the lake