Indeed. Once I've chopped the bayo lug off, you try to put it on the barrel. But the few times I've done this job, I've had to clean the barrel a bit - or a lot in one occasion - with fine sanding paper so that the front sight slides all the way in. (bit by bit... you want the front sight to fit tight, but not so tight that you need a sledge hammer to drive it all the way in). Once I'm happy with where it ends up, I mark the barrel through the front sight pin hole, remove the front sight, file a notch of the same diameter as the pin (carefully, and trying to keep it leveled). Then, slide the front sight again, index it one last time, put the pin in.
This thread reminded me how fun this job was so I've decided to do it again on a bubba's SKS I've kept here, so today the motivation was there. Give me a few more minutes I'll bring pics.