I have just replaced my old standard rear shock with an R6 unit supplied from Kebab19. It has been one of the easiest mods I have done, remember to fully clean and check over the suspension linkage, mind all the roller bearings, re grease and replace any worn bearings. I would say the entire job took no longer than 2 hours. All as I need now is more bend on my knee as I have had a full replacement joint, maybe this will save on a knee slider as I am reliably informed it is titanium.