Originally Posted by JimBeans83

On that other note : thatīs whatīs being asked - what force are you using for saying that's adequate, for both brake and derailleur ? As this is entirely dependent on the lever being used and the strength of the person squeezing/shifting.

For braking, there is a considerable difference between what will lock the rear wheel and what one can squeeze beyond this point. For gears - certain levers continue to apply a reasonable amount of force once the front/rear derailleur has met one of the adjustable stops. During the inner gears, of course tension changes are minimal. Another failure will be if something snags an exposed cable.

On longevity : I'm also not sure of the long term viability of the epoxy considering the system as a whole under normal bike usage. Temperature changes (different coefficients of material expansion)/not knowing if it's been applied perfectly/contaminants entering, chipping, vibration, etc. JB weld seems to work quite well when it's penetrated something. I've had mixed results using it purely as a surface glue.

Not a criticism - the idea is much better for many reasons, especially DIY placement and avoiding painting issues. Just sorting this out out-loud quantitatively rather than relying on gut feelings.