Hey Kelly
I understand your opinion ...though I do think such should be kept to emails-pms.

With that said I will give my 2 cents (in a positive way)on the subject of the Montana Longbow and Bear archery.
It sounds like you concluded the pros outweigh the cons or you wouldn't have purchased 5 of them imho. Also , these have been in production since late 90's..1998ish
Over these yrs it has had some small tweaks in design I believe , but you would have to ask Bear archery for verification on that. I have had the thicker core and thinner core ...Brown glass, black glass. In the yrs 2011-2012-2013-2016.
Yes , all have a slightly different string length needed per brace . Mostly because the handle configurations all vary somewhat as Bear archery still does a LOT of hands on grinding . Is this an excuse for what you speak ? NO . ...but , like every other manufacture , Bear archery likely has a large turnover employee rate . Also likely a few of your bows have "years" between manufacturing dates=likley a different person shaping/finishing out the bows. Coupled with Bear likey using thin core/thick core to more economically utilize core woods . Again, you would have to email Bear for clarification on that as well.
The Montana is a Great bow design (and still a good price though it is ever rising) regardless. Do the different years have differing bow grips ? O yea..just grab a 1998ish and compare it to a 2011---2025 ;)Has the design been tweaked over these yrs ? yes.
Even a lot of custom manufactured bow grips vary from bow to bow. Even using pnc machines when the finish work is via human hands...
Could Bear archery do better ? Yes ...we all can
