No worries! Was gonna post an update yesterday but I ended up going to sleep earlier than usual.
Yesterday, I cleaned up (antibacterial soap and triple antibiotic ointment) and changed out my tegaderm, and then I actually cut a small strip of tegaderm to out over the magnet install, and it’s worked out really well. Ever since I removed the glue, I haven’t had any issues with rubbing or irritation from the magnet placement. The magnet itself is still super low m-key, and can’t be seen under the skin. I forget it’s there honestly 
I still haven’t felt it vibrate for anything yet, but its placement has worked well so far.
Only thing that’s out of the ordinary is that there is a specific tendon in my hand that feels sensitive. As far as I can tell, it’s the tendon for my ring finger, so it’s possible that the magnet has irritated that in some way, but I can’t say for sure. It’s not painful or anything - it just feels like my tendon is sore, like I used it to do something strenuous and it’s recovering. I expect this to get better still (it’s only been just about a week since initial install), so I’m just keeping an eye on it to see what do.
Moral of the story: looks like the placement seems like it’s working out well from a logistics point of view. Have to wait to see how it reacts to fields to have a better idea of its value long term, but so far it’s a thumbs up from me!