Yep, I think it's in the maintenance manual somewhere. You have to drill out the rivets and take the end cap off to repack the exhaust.
I should have mentioned that the end cans I have are the standard cans fitted to the panigale r which are different to the performance cans.
there are a few options , ive been looking for a couple of months now, the R system is full titanium so id like to fit ti end cans, then you should remap it really. Not sure if you can remove the flapper valve too.