My 5.7 currently sports a non Kash RP23 in perfect working order but it does blow through it’s travel a bit and looks a bit pony.

Aside from size (200x57mm) I know it has a specific tune i.e. ‘rebound extra light’ so if I am looking at replacing it with something like a DB or VIP’r from here or eBay what do I need to do it it once fitted to achieve the right tune?

Is it a high volume can that is on the RP23?

If so get some volume reducing spacers in it that should help with the blowing through the travel.

http://www.pinkbike.com/news/tech-tuesday-How-to-Install-a-Fox-Air-Volume-Spacer-2011.html

For a retune of a monarch RC3 Plus I had to send it off to a pro (Loco) to get it changed from a medium medium tune to low low for my iron horse Mk3. don’t know if the CC or BOS shocks can be done with the adjustmetns ont he shock or not.

RE high volume: Not sure, I think so but bike is at my LBS currently,