The upgrade from Jr. to III or IV is a significant improvement, adding detail, clarity and extension - well worth it, IMHO. I did only part of it, buying the platter, bearing and springs but I made a plinth and armboad out of Corian (you can usually buy a scrap from kitchen remodeling companies). I figured if it was good enough for Well tempered it was worth a try. I produces an amazingly coherent sound across the spectrum, worth checking and a lot cheaper than buying the VPI steel/acrylic subchassis. I have not heard it vs. the VPI but many who have listened to it have been impressed with the sound.
