How to deal with stripped out holes on Firewall

toolmanmike said

Or check out "nutsert" on the net. You know, your local tool rental place may have a kit to rent. They are a permanent fix.

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A tool can be improvised rather than spending money or renting.
I modified some draw cleocs since I was in aircraft mtc.
But the principle would be the same.
Just get a long machine screw, nut and rig some spacers.

Thanks for the motivation.
When I went and looked for these, I found that lost piston stop I made years ago.
Could not find it recently and had to make another one.
Now I've got two.