I recently saw
DryMistat which appear to be a much better design for mason jars. The thing I don't like about Bovedas is that you have to handle and bend them a lot to insert and remove them. They start getting a little ragged and I've read reports of them leaking. Their design is more for cigar boxes which usually have a slot under the lid to hold the Boveda pack.
Boveda also doesn't advertise that their packs can be recharged by storing them in a mason jar with a damp sponge. (They don't do this probably because it implies repeated handling which wears them out over time, increasing the risk of leaking.). DryMistat plays up how their tubes can be recharged.
I contacted DryMistat to see if they've considered a 62% product. They replied saying it's something they want to do, they're looking for more information about this market segment. I suggested they make a few sizes for small to large jars. (I haven't actually seen a DryMistat. Maybe there's something that makes it not as optimal as I believe them to be. But, they look easier to work with and longer-lasting, less risk of leakage.).
BTW: Be careful of vacuum sealing your mason jars with boveda packs inside. Boveda acknowledges that their packs can contain small amounts of air as a result of the manufacuring process. Vacuum can cause an aneurism in the membrane and leakage of the solution. That probably won't affect many people because I think of vacuum sealing for long-term storage, whereas boveda is to maintain humidity of frequently-opened jars. Not much reason to do both.