Originally Posted by Jdeks
Guys, thanks for your advice. In the end, I did neither - went with the bored out cam chain bolt option (as per cpmodem).
All your (very valid) cautions about debris made it seem like too much of a hassle to have to drill out every new oil filter.
What I'll do with this oil cover now though I don't know. Oh well.
Thanks for all your help
Put the cover in the flea market. It looks like someone might be able to make an oil cooler feed from that for a rfs. Or another ktm.