Yes Yes and Yes..
I have all the Peterson Mods done to my scope and they have all made an improvement on my system.. You will find the Bobs Knobs easy to use in the dark as they are easy to feel rather than messing around with an allen key. Also trying to use an allen key in the dark whilst not bumping your scope around is a pain in the bum.. Bobs knobs are cheap and will make you collimation very simple and painless..
Only tip with collimation is little adjustments (very small) and when putting in the Bobs knobs, only do one know at a time so the secondary mirror stays attached. If you remove all the screws at once the Secondary will fall off onto the primary mirror..
Regards
Mardy