Working to fix one of life's biggest annoyances (in the sense that nothing bad whatsoever will happen to you if you don't, but there's got to be a better way):
The chewed up ESI. After looking around for someone who has made a grip-protecting bar plug, and coming up empty, except for boat anchor BMX stuff, or frou-frou roadie crap, I set out to make my own.
Step one, not shown, make plastic ends. I used acetyl copolymer, because that's what I had on hand. After I'm satisfied with my proof-of-concept, I'll get some black UHMPE
Step two: manufacture some lightweight t-nuts* capable of squishing material to hold it in place:
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Don't mind the second from the right, the torch got a bit frisky. I had wanted to use a #3 tip instead of #4, but it was clogged (couldn't light without auto-extinguishing), and I forgot I had spares. 4 was definitely too big, and honestly, 3 probably was too, but my #2 was completely missing. #1 would've been fun, other than it being ridiculously small/underpowered for this (and I don't like open flame lighting, anyway).
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Post brazing/de-fluxing. Two slits cut with a jewler's saw, then bent down to create teeth to grab the cork. I finally settled on oversized cork, tapered with a microplane (did you know? That's the original use for a microplane: wood working with soft woods).
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Installed with a firm thump, then snugged with the screw. Testing up next. This should perform the primary function of protecting the grip end, but also keeping the grip from walking off the bar.
*despite using brass, total weight for two is 10g, a 4g penalty from ESI bar ends. I might be able to get another gram off with UHMPE and using steel for the t-nut. As it was, I had to make a thin reinforcing washer to go between the cork and the end to keep the screw from pulling through.