It's just really damn nice. Everything on it is tight and correct. I did find where the No.4 Main Jet has been silver soldered shut, and redrilled. Hmmm? When I held it up and compared to the stock No.4 jet, I couldn't really see any difference. I tried some small check pins and it appears to be just slightly smaller hole in the jet (which would make sense) or you would just drill it larger. I set all the initial settings as it says "in the book." I added the bowl spacer, and longer bowl screws. Float height set as stock.