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@Sheppz
Fitting 53mm bluemels to a 90s Marin over here -https://www.lfgss.com/conversations/326226/ - rear frame bridge had a threaded boss on the underside but bolt was corroded, stripped and stuck inside. I have broken all my drill bits trying to drill it out. SKS supplies a plastic bridge which looks shithouse and the rear hole on the frame bridge is (for some weird reason) not central. Im thinking either needle file the rear hole sideways so i can mount either the plastic bridge (or steel replacement) central. Or drill 2 or 4 small holes in underside of guard and ziptie to rear bridge ?
Whadda I do !?