Yes must always be round.
I’ve got a switch where the choke is normally located. Think I did a post about it a while back.
The bracket I have is a home made job but I actually have a gen poor condition rally pack bracket im keeping and will make a rep of if I ever switch over. Or if it doesn’t rust down to nothing.
Thanks I think the shine is photoshop induced. The photos were not mine but taken by a photographer that was around during the day.