Just finished converting my 4/0 penn using a Jvariance kit (frame and sideplates). Easy to swap out the parts-took about a 1/2 hour. Added a 4:1 Newell stainless gear set, greased ht100 drags and an Accurate handle (all from Charkbait.com). The Jvariance kit is very nice quality, both in the machine work and the anodized finished. Only precaution to take is care in tightening the two short screws at the back of the frame-snug only or you'll strip them out. For 95 bucks you can't beat it. Also, had some questions and the owner responded quickly-great customer service.