Good morning! I was attempting to install my cylinder liners last night and could not get it in the last 1/2 inch or so. Aftermarket (CTP) cylinder kits, grease on orings, putting in with dead blow and wooden block. Liner slid in pretty good without orings but is stubborn with the orings. I have been thinking of trying to press them in with a gear puller set up between studs. I don't have fancy equipment, but I don't think a D4 is too fancy either! Thanks for your suggestions. Elton