Barrel adjuster screw rounds very quickly....and doesnt index the gears anymore ..any advice please?

Arequipa

Evening,
I have x2 roadbikes with Ultegra 6800 and 105 r7000 rear derailleurs.
I have learned to index them quite well, but find that the adjustment barrel screw rounds or de-threads very quickly.
So the barrel doesnt really index well anymore.
I have put in in line barrel adjusters and these work okay but possibly not as well as the adjuster on the actual derailleur...

Do any of you relate to this?
Can the in line barrel adjuster work as well as the adjuster on the derailleur?
Is there any way to rethread the barrel screw on the actual rear derailleur?

Thanks for reading,

A

nicksnikita

Strange that the tension adjusters have rounded on both of your mechs. I don’t think I’ve ever had that happen. I have seen damaged adjusters though and I’ve found that they can be replaced by the ones pictured below which works well.
The inline ones work ok but I’ve had them lose tension gradually in the past as well.
Do you have a tension adjuster on your frame?

Would you be able to epoxy a nut where the barrel tensioner should be on your mech to receive one of the tensioners below? Could be a stupid idea but it’s easier than installing a helicoil..