Straight forward replacement of old bolts for new, threads are same. Initially used lots of plumbers PTFE tape to stop rotation of bolts when bow was unstrung, as the system for locking bolts is different on
Hoyt bows, then used original limb bolts as lock bolts and finally got couple of short allen screws to use as locking bolts. The only drawback I have found is the heads are a little wider so you cannot wind bolts down fully.
I have an unmodified riser as spare and definitely a reduction in noise with modified bow. Would not like to say if modified bow shoots any better, but to me excess noise is wasted energy. Cannot say if spending the money for the bolts was worthwhile but for me was worth the chance to play with things.
Had a few comments when people have looked at bow, especially when I was using old limb bolts to secure everything, and had never thought about using them.
Hope this is of use.