I am an intermediate wood worker. I've made a lot of things. Current project is a jewelry box with some invisible hinges. I'm making a mortising jig to cut the mortises. I'll be using my Skil 1825 router with the plunger base. First time using the plunger base. I must be doing something wrong because with the plunger base on the motor and the plunger fully extended there's a long gap from the collet to the bit. Do I need an extender of some kind? HELP?