Hi Paul,
You will void any warranties if you change the scope in anyway.
I did it anyway, but thats me.
I got the clutch kit from Bintel, but the rest i got from Pete.
I also have Bobs knobs. I hardly ever change the collimation, but they work well. No more allen key.
If you have any problems or need advice I'm sure we will be glad to help.
Best.