I read that the machine that makes the necks was originally built for carving gun stocks. The inventor guy, Chip Todd, participates in that forum and has a custom shop in his garage or something. I think he lives in texas anyway.
The hardware also adds to the mass of the thing. The knobs are of cast metal and weigh like a pound. The bridge is also 7 times as heavy as a normal hartail strattish bridge.
I don't think they are interchangeable with fenders. They are a unique animal (Or vegetable or mineral). If you have time to dick around, you can get alot of neat sounds from them, but for live use, you can't quickly change the tones.
Just an example. Mine sat under a bed for 15 or 20 years. I got it out and thought the middle position sounded like inside out guitar. Total shitte. Then I found that by using the volume and tone controls (which control the single/humbucker mode), you could get some really neat in-between sounds. Unfortunately, you don't really have time to dial it in between songs. For recording it's pretty good. It's quiet and can make a bunch of different kinds of sounds.
This is all talking about the T60. The T40 has essentially the same electronics.