Quick question. I have sourced some thick walled hollow bar with a 1" (25.7) internal diameter. I can buy some bright steel bar to cut to length for pins to run in this tube as the pivots. My question is whether 1" bar would be too tight in the tube (Length would be about 70mm) and I would be better off with 25mm bar? If I provide grease nipples on the tube would that take up the 0.7mm slack on the 25mm pins?