I've got a 5 spot that I've put many miles on over the last year or so. When doing routine maintenance I have yet to get any grease to enter the bushings. It pretty much just comes right back out. Is this something to be worreied about? From other posts it seems like some need grease more than others...but Im now at over a year Im starting to wonder if Im doing something wrong. Im using prep-m and the recommended injector nozzle.