I have a similar plan that I have been working on. I started with the idea of converting a Tweed Vibrolux kit but that turned out to be too much unneeded parts so I am going to use the cabinet and chassis for the Vibrolux, the schematic for a Two-Stroke, and add the VibroChamp AA764 vibrato. After seeing the comments here I think I will add a switch to take it out of the circuit when I don’t want it so that I am in full Two-Stroke mode. I am also planning on adding additional switching to bypass the tone pot so that I can utilize it as a full blown Champ with the 8 inch speaker. I am a first time builder so I am looking forward to the challenge.