To De-Buzz an instrument, you need to move the new nut back (toward the headstock) by 0.030". You can use a 0.030" thick shim between the end of the fingerboard and the nut, or you can seat the nut against the fingerboard and trim the front face back on an angle or a step. As long as the witness points (the front edges of the slots) end up 0.030" past the end of the fingerboard, it will be back to normal. Don't move the bridge or anything else, just reset the intonation as normal.
One note: If that MTD came from the factory with the Buzz system installed, then you may want to check the installation carefully. I believe some factory installations used a special nut which slightly overhangs the end of the fingerboard. That allowed them to use the same fingerboard and slotting for Buzz and Non-Buzz instruments, and easily be able to switch them. If it looks like the nut is overhanging the fingerboard by 0.030", then you can pop it off of there and put a standard nut in its place.
Thanks @Bruce Johnson ! I might send for the bass and give it a careful inspection. It would be awesome if the string nut popped out and allowed a standard replacement! Thank you!
I believe the MTD Kingston Artist model uses a zero fret which pretty much takes the nut out of contention.
Riis
Thanks @Zooberwerx ! Everything leads me to believe this might be doable. I have four other lefty basses strung righty and they intonate perfectly.
Fussing about exact intonation intonation is an exercise in futility. For instance, did you know that E in the key of C is not the same pitch as E in the key of F? And that G# and Ab are different pitches depending on the key? it's a bit tricky but to understand it you need to get a grasp on the structure of our 12-tone scale and the physics of the harmonic series. Fascinating study, and if you are OCD it may drive you away from music entirely.
Guys, I really appreciate the information. Anyone else want to chime in, please do! This is a good learning experience for me, and I just may get that bass!


