Vintage upgrade

Hi, everyone. I am new here and relatively uninformed about much concerning TTs. I have a 40 yr old JVC belt drive manual w/auto return that I have used on and off over the years. After considering a new TT, I decided to try my hand at upgrading this old dog, which still preforms well, before trying to justify a rather large expenditure to the wife.
The first thing I did was take the platter to a local machine shop, where it was re-surfaced and the spindle was tweaked. This virtually eliminated what had been a rather severe up and down wobble due to a bent spindle. My next step will be a new mat. I'm leaning towards a Herbies Audio Lab, Way Excellent II. Next will be simpler things like ensuring proper alignment and balancing of the Blue Oyster (?) stylus on the old JVC S-shaped tonearm.
Some things I have considered are a new suspension in place of the old springs on the corners of the chassis and a new motor. The 40 yr. old original has a slight hum. Not too bad for my ears, but the idea of course is seek perfection without actually paying for it. My problem, motor wise is that there are no identifying marks or lettering on the original and no info from JVC for something this old.
Ideally, I would eventually like to build a new base to accept the existing chassis and also isolate the motor.
I will do all this and more unless I receive an avalanche of protest from the more reasoned minds on this site.
Finally, any suggestions? Or is this a waste of time. I love the ol' girl and would like to keep her happy.
(talking about my wife, here.)
The Herbie costs start at 50 bucks. If I were you, i would go to Home depot and get a roll of thin rubber non slip padding (it has kind of a woven waffle design with tiny holes and tiny squarish pads a bit less than 2mm thick. Cut it round and it will do. It would be only about $4.
(As soon as I saw the stuff, I thought.. Hmm tuurntable amt material.)
As far as using an old TT. What makes you happy is what matters most.
Great idea about the mat material, Elizabeth. One question, though: how does one go about cutting a near perfect circle? Thanks for your thoughts on this. Happy Listening
Is your motor starting to vibrate causing it to hum?
"about the mat material, Elizabeth. One question, though: how does one go about cutting a near perfect circle?"

Put it on a wood cutting board, place a record on it, cut around it with an x-acto. Mark the center hole and cut it out.
Hifihvn, close visual examination of the belt drive spindle doesn't indicate anything unusual. I think the hum is electrical in nature.
How does one go about finding a replacement belt drive motor that would work in something this old?
I don't know any sources for one.Maybe a used TT. One may pop up for sale somewhere that may have a cracked dust cover but have low hours on it selling for a good price.If your bearing seams ok,it may keep on going.Who knows how popular your model was.