I got the Slingerland lugs, and guess what? They, too, are too short to cover up the existing holes! There went my plan to place the four non-conforming lugs on the player’s side so they wouldn’t be seen. It turned out okay, as the lugs generally mimic the overall shape of the original Yamaha ones. See the photo.
One thing had not occurred to me until I put both heads on the 10” tom: no vent holes. It didn’t seem to matter on the 12 and 14, but I can definitely feel and hear the difference on so small a drum, particularly since it is so shallow. I need to think about this. This is my opportunity to place a badge on the drums that doesn’t belong. Maybe a custom made one at one of those “We engrave anything” shops? Or maybe just a drilled hole with a plain grommet, which is what the floor tom has.
Either way, I am extremely happy about my decision to add a bottom head to those toms. They sound great, and I haven’t really spent much time on tuning them. The 14 sounds so much better since I leveled the bearing edge.
Eventually, I will probably convert the 16” floor tom, which is only 14” deep. It should be a good step between the 10x14 and 16x18.