3) Instructions? What instructions?

Mojo provided 11x17" photocopies of the component layout and the schematic, and that's about it, two sheets. A Google search of "ab763" results in tons of renditions that are closer to the Fender originals. The on-line ab763 schematics are in a couple of versions (C-FD and J-FC) and are basically the same.

Interestingly the schematic that comes with the kit is a totally redrawn Mojo version of the ab763 that has a gaping error in it. The "D" supply that powers both preamps shows an incorrect connection to the plate of the normal-side 12AX7 tube. This shouldn't be. A verification of this schematic against the Fender original will set you straight. Also, a couple of resistors don't match between the Mojo schematic and Mojo layout. I called Mojo and noted the "D" supply error. The guy agreed and made the change on the master. It amazes me that after all of the kits they have sold, the error hasn't been picked up. On one hand, Mojo appears to be a very conscientious and reputable company, and on the other hand, they seem like two guys working out of a basement.

Their pitch: By not providing step by step instructions, Mojo say they are limiting the likelihood that the circuitry of any two amps will look and sound the same. Each amp will be built as the builder chooses, each having unique characteristics. Kind of like creating audio art. At absolutely no additional cost to you, they have provided the premium service of allowing you to blindly create a unique sound experience. Is this good marketing or what?

My bitch: The problem arises when the builder has no previous experience with tubes and tube heaters, proper grounding principles, and a sense of proper lead dress. Previous experience has gifted me with a sense for these. Not always the case.

Marsh provides a similar kit and does provide instructions, at least that is what their site says. Marsh may also use Mojo cabinets.