Refitting OEM muffler issue.

Not exactly the same but I had a similar experience with fitting an X pipe to my Thruxton 1200 to get rid of the cat. Peter at Meerkat Mufflers in Gympie (who is a genius by the way) told me to remove the RH frame rail - I was fitting one of the first X pipes made and there were no instructions or how to’s anywhere. I struggled and could see that taking off the LH rail would have been easier. When I asked him why he said the RH side he told me that his tool box was on that side of his workshop hoist. We both think it’s funny……now.