I fitted the conversion and it so far seems fine. I probably put in a newer set of Rollers that Phil provided, they were brown in color. Not sure if Calum used the same one I did but mine are holding well so far, although I only have about 500 miles on them.
I am running Stage 2 w/roller rockers to give you an idea of what power is being put to the rollers.
Calum nailed it, they are soooo much easier to change now that the conversion is done.