VPI tone arm set up


Wanting to get back into analog, I just completed all my purchases (here on Audiogon) and am ready to start putting everything together. I have a VPI Aries 1 turntable, a VPI JMW 9 Sig. tonearm and a Shelter 501 mk11 cartridge I have mounted to a Cartridge Man Isolator. My question is- I understand the distance between the spindle and tone arm pivot is to be 223mm. Are they talking about center of turntable spindle to center of tonearm pivot? Also, I purchsed a VPI tonearm jig and noticed it only has 1 null point (inner, closest to turntable spindle) where as other jigs I've seen have 2 null points. Will this align correctly?
markpao
Thanks everyone who has responded. I will probably purchase the Mint Tractor just because I like to tweek, to me thats where half the fun is. My concern here though is that a couple of responces are pointing to maybe the Shelter 501 is not a good match for the VPI JMW9 tonearm. I was wondering what cartridge you guys are using that would be a better match? When I contacted VPI they did suggest adding weight, thats when I decided to go with the Cartridge Man Isolater, I think it adds about 2 grams.
I have a Benz Ebony LP, and had a Benz Ebony high output...both wonderful. Dyna xv-1 is also great. Listen to both and decide.
I have the Clearaudio Virtuoso Wood and until I really spent some time and dialed it in, I was disappointed. The Mint Tractor was what brought it around and now it surpasses my Cary 306 SACD. Problem seems to be finding really good Vinyl.
I use a Sumiko Blue Point Special Evo III with excellent results for my Scoutmaster. The Gingko Cloud 11 is a must as well, definitely improved the sound.