Charlie,
Thanks for the heads up, my GT5 tramlines terribly and pulls slightly under braking. I'm going to correct the caster by modifying the a-arms when I can get to it (focusing on and just done same on the '74 at present). The rack shims will be one more area to look at.
I recall David B had a similar issue with an elusive pulling under braking so I'm wondering whether there is a common thread here.
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