I decided to tackle the bumpy, tight cabin door to my 2001 280DA. I got the two plastic roller balls from the lower track removed. I ordered replacement balls from FP Marine. Waiting for them to arrive. The lower track system has two balls, one port of the center stopper and one starboard of the center. The ball to port is badly worn while the one to starboard shows no sign of wear. Question/Opinions please: If I slide two balls on the port side and two balls on the starboard side, instead of the single balls, logic tells me the load would be distributed over twice the area. Is my logic flawed? Would this cause a problem I am not foreseeing? Has anyone tried this?