Converting GP fork buffers to LI/SX

Stripping a set of GP forks down for a mate & the tab that holds the bottom fork buffer in has broken/rusted off
on the one side.Is is just a case of getting a bolt in one and drilling the holes? I'm thinking, get some masking tape onto the bolt in buffer marking the holes up and then placing onto the fork- sound right? Also do I have to remove the complete buffer plate inside the fork leg or can it stay where it is. I see Scootopia do replacement buffer plates, I assume this would have to be welded in http://www.scootopia.co.uk/product/6285 ... ment-plate
