Does the Mitchell stub make the arm too long to fit under the dust cover?
That's a good question, and the answer is: Not at all, there's plenty of room.
FYI - a nice article on this tweak is available at
The Vinyl Engine. I found install of the Michell product to be relatively easy (please review the note at the end of the article regarding securing the arm when removing the old arm stub. My old stub removed quite easily.). When doing the final setup, you have to make sure the scallop weight is visually horizontal - I used a ruler to assist me, but I've got older eyes.
There's a number of dealers that handle the JA Michell TecnoWeight.
BritAudio has it for $129 (it's in the middle of the web page), I'm not sure what others are selling it for, but Michael Wharton at BA shipped fast and was very helpful.
Also, here's a link for that A-Gon
"Strange Tonearm Tweak Long" by TWL.
Happy listening!