I just presented the list, 'J'.
I am only in favor of a very few specific mods.
and Bridgework stands aren't among them. I favor mods with little metal.
And while I'm reluctant to name stuff I haven't heard, seems that matching amps and Marchand crossovers have a following. Some prefer Bryston or some even Pass or Mac. This for the wealthier bi-amp crowd. If your friend used the Beheringer crossover, that may have been the problem.
Nope, I'm heading in a slightly different direction. Real wood reframe which has a good following and really improves the look. I simply can't imagine getting rid of the MDF to NOT help. Others install Dynamat, a CLD product, between frame and driver.
At the same time, all the wiring will be fixed in the form of removing all the 'extra' stuff like fuse and bi-wire fitments as well as changing to real binding posts. IF I ever do any crossover mods, it's likely the stock design will stay but a better grade of part substituted.
http://www.indiespinzone.com/magnestand.html
Magnepan, as I'm sure you'll agree, is built to a price. Given that people are invenerate tinkerers, it is logical that people will mess with 'em. How much do you think a 'cost no object' panel would cost?
A few overachievers have taken measurements. I have no conclusions about them, since the sample is small and technique unknown. Nobody has yet done any accelerometer readings on frame or stand.
Where do you stand on cables / interconnects / power cords? Isn't that a form of 'tone control'? I've seen endless posts with people arguing about Silver vs Copper and the characteristics of various insulators.
And finally, did you know that Magnepan changed direction sometime in the '90s? My original MG-1s came to me stock. And I listened to them that way for over 2 decades and a rebuild in White Bear Lake. They were even marked 'left / right' and worked best that way....except in 1 special case.
Now, I get my new 1.6s. I had a heck of a time making them right in my room. That is, until I simply rotated them in place. Now, i'm listening to the pole piece side, just like my original panels. The effect was a dramatic smoothening of output and less beaminess. I haven't touched 'em since the swap and setup. Magnepan has been shipping 'mylar to listener' now for probably about 15 years. And I can say my toe-in is just under 11 degrees and spacing from wall about 32".
Enjoy your stock panels. Trust me, You're better off that way. Some of the mod guys I've read about have become nutty / obsessed!