I made a tool from two bolts connected together, see pic (no welder at the time so had to resort to alt ways of locking threads). The internal damper fits a 19mm bolt head (the long bolt). Insert this into fork damper to lock it while unscrewing the cap screw. Works fine, but will probably add a T handle. Whole lot cost about $20 from a bolt shop.
I guess you could use threaded rod with a nut and a couple of tack welds. Or just weld the top of a 19mm bolt onto a bar.
Hilleye
If it doesn't bring a tear to your eye, add a little more fully synth 2T to the mix.
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