Thanks for taking a shot at it!
I don’t know MM that well, but that would be one of their higher end models, right? So those likely represent the best/lightest tuners they have, probably similar to the US G&L, Hipshots, etc.
On the various budget lines, the tuners tend to be heavy (except for the Lakeland Skylines). For the Fender Players, the OEMs are said to be 95g each (verging on a pound just for tuners!), while the GB640 are 62g, so for a set of 4 it’s a difference of 132g, or about 4.65 oz. (Hipshot HB7 direct drop-ins are listed at 85g, so a better tuner with a finer gear ratio, but just 1.4 oz in weight savings. The Hipshot ultralights are closer to the Res-o-lites.)
I’m assuming the Tribute tuners are pretty similar to those in the Player - people who have done a change out have described them as very heavy compared to the Hipshot ultralights, and that swapping those in made a big difference. Just still wondering if there are any other options that would be less “messy“. Getting a pretty clear sense that there likely is not...
I have some time to decide, since I have two other basses that need attention first - going to clean up the fret ends on the Player and do a string change, and then I will stick the aged Res-o-lites on the Road Worn and clean up a few errant frets on that one as well. Changing those tuners out should give me some idea, also, about whether it’s worth it or not on the LB-100.