I am rebuilding the forks on my 1973 Commando 750. Have cleaned all parts, replaced fork leg, spring (Progressive), bushes, seals and washers (from Old Brits). My problem is that it won't go back together. The steel bush at the bottom of the fork leg doesn't want to slide into the slider. I tapped it in gently with a rubber mallet (about 3"), but it would not slide and I was afraid to score the ID of the slider, so I pulled them back apart (difficult). The new steel bush is 0.005" larger OD than the old bush. I considered using the old bush, but it is a sloppy fit and allows a lot of side play. The slider ID measures round. What am I doing wrong? Any suggestions?? This is my first restoration.