your friend is being correctly cautious...i would only do something like this for someone if they knew what was up.
however, while i'm sure dennis has torque-specs (if someone has those, please jump in with that info) and doesn't just make them "really tight"...i did not hesitate to make my mod because i know how to make sure something goes back together "really tight" too
(i used the same crescent-extension to re-install)
do you trust your friend, does he trust himself? once you "break" one loose, you'll know what's going on and can relax.
BTW-i never once
assume anything about a mod that's new to me...i check my bolts on a very regular basis...apparently i got them back "really tight" enough because all is well (a plus of higher-quality hardware)
...don't let me push you into something you're not sure you wanna do...if you want to move forward, i bet we can succeed