This may be a sideline, but if you would like the ultimate in truck mounting, I may have a soloution.
My problem has been the addition & removal of the trucks for maintenance, fitting, & painting…
Tapped plastic wears thin when tapping a truck boster, & expecting repeated results.
I found a brass tube that was nice & thin, & also accepted a 2-56 tap.
I needed a tube that would act as a shoulder for a truck, & accepted a 2-56 screw to secure the said truck.
With some research, I found that the brass tubing offered by Tomar, called a 3/32" thin wall Brass Tube, (#6006), actually gave me what I needed.
It is a common outside diameter, so pilot driling is easy.
It has an inside diameter that is almost correct for tapping in 2-56, (slightly tight, but nice!).
I follow the ‘excellent’ tips by former posters for plugging the hole, then I dril it out, on center, with a 3/32" bit.
Then I rough up the outside of the brass tube with 180 grit paper, then chuck it in a drill & tap it to the 2-56.
Then I chop a section of it, & glue it into the bolster hole…
If you are carefull, you can put a screw in it & use that as a lever, to adjust the shoulder depth & the other fitments (squareness, etc.) of the threaded shank.
These will rarely strip out, or cause any problems, & if you have electified trucks you may attach wires, up inside the car, but I would recommend a soldered bearing washer in that case.
It may be worth a look, especially if the plastic threads just lost their bite… A 3/32" drill will hunt & follow that hole & you can have a nice reliable repacement.
Just some thoughts…