Cruiser, looks good...but I wouldn't have filed them though. This is just my opinion, so take it with a grain of salt. Reason is the dove tail has a hollow void that flexes a minuscule amount as it is pressed in. A little CLP is all that is needed. The CLP will provide enough lube to make those minute adjustments (with pusher) before being shot out at the range. Solid dove tails would need to be filed (ie. Warren rears, etc). Now this opinion is solely based on me putting on a set dry on my 26, and lubed on my 19. I noticed that the resistance that you probably felt (if put on dry) was caused by the walls of the dove tail. It was not coming from the bottom. So given that the tail was hollowed I did not want to take any material off the wall. It was a biotch pressing it in dry, and frustrating making small adjustments. CLP fixed that though, but had to wait for it to soak in where it was needed. On the 19, I lubed it from the get go, it pressed on a hell of a lot easier, even though when inserted by hand it stopped at the same place as the one I put on dry (in other words it pressed in just like a solid dove tail would when filed to reach appropriate position when inserted by hand). Tiny adjustments were exact, CLP was shot out, and the sight has been rock steady (hasn't moved).