I built a WH2O, It's fun collecting all the parts. I found a partial wire harness from a backbox cut at the neck, which saved a bit of time. Williams manuals are pretty darn good. I bought the correct color coded wires from bay area amusements and wired the playfield from scratch. It's not bad; run 4 or 5 wires a night and you'll be done before you know it. Figure an easy 6 months to a year for the project, and expect to rig up a few bits and pieces on your own, mantis amusements sells strips of ball guide metal which is handy. I spent about the price of a player condition WH2O, MB is probably a better deal if you enjoy the work.