I substituted some of the low-grade parts included in the kit with the best I could find at Norvac Electronics: the signal caps are mylar bypassed with Dayton film/foils instead of the stock polar electrolytics, the equalization capacitors are silver/mica instead of the stock ceramics, and all the resistors are NTE metal oxide.
The sound of this is actually pretty good surprisingly. Overall I like it better than my friends slightly modified NAD PP-1. The only area the NAD beats it is the deep bass extension but we're planning on putting polypropylene caps in the NAD soon though which should turn the tables. Next up will be a Bugle phono preamp from Hagtech.