bought this large 3.5 hp router from sears as a closeout. Seems to be a lot of friction in the plulnge mechanism. So much so that I cant use it mounted in the table. I have taken it apart and notice that one of the holes for the plunge bars is metal and the other has some sort of liner material, looks like plastic. Parts manual gives me no clue as to why one is different. Is there anywhere to have this alignment checked to see if one of the bars could be bent a little. When attempting to raise the unit under the table, the unit cocks and will neither raise or lower. Please help if you can. Thanks, WC