If wanting to run weight tubes, couldn't one use a little glue gun adhesive at the insert end to attach the tube at the front?
Soft to some degree, doesn't break the joint in shock like full hard set adhesives.
I've not run weight tubes, but for inserts and added weights, do run the glue stick type of softer adhesive in my carbons. Have for years, allows for easy mods without damaging the shafts, seems to hold the inserts in just fine.
Of course weights added to my insert do mean more glue over a larger area, so that might be why it's worked well for me (and not be fully attributed to adhesive type).