Hi guys, yes the kit comes on its own, it is a complete kit apart from speaker and cabinet though. It cost about $450ish shipped for the kit, plus the speaker at $75 and about $80-100 for materials for the cab. Just the one channel, and gain is pretty good, there is a bypass switch for the tone stack for extra gain, and a two way boost switch (fat and bright) which doesn't add a huge amount. I haven't had a chance to record samples yet as I don't have any decent recording gear, but it is on the to do list It comes set up for the valves supplied but if you fit different valves for different tones you need to adjust the bias voltage.
The seat is out of an old corolla I used to have as a project car, until I realised how expensive it was going to get!