Can't help but reply to this one.
Are you kidding?
Anything you construct, build, etc., especially an electronic device, such as a guitar amplifier, requires attention to detail, neatness, economy of function and layout, and thoughtful planning in all areas of design and assembly. Frankly, this is "Engineering 101" for those of you that may not have a technical background.
Multiple problems have been identified in amplifier designs which LACK this attention to detail, e.g. parasitic oscillations, cold solder joints, broken wires due to excessive motion of wires/parts from vibration, hum, heat damage to components, and on and on and on...
Just as an example, since we're critically analyzing (not dissing, so please, no one get your feelings hurt - don't forget, I own a Bruno), look carefully at the photos Germ provided inside the UG30 chassis. Note that there is a green wire from one of the input jacks leading to the circiut board which has been soldered in place very taut, without any slack. I have always known that this is a potential problem because any jolt, or maybe even vibration from normal use could compromise this connection over time. That's why amp builders don't ordinarily secure connections in that manner when reaching from chassis to board, one board to another, etc. Well, TB did that, and it's a mistake.
Furthermore, although sloppiness in wiring and layout does not necessarily negate other positive attributes an amplifier may have, it can certainly be used as an indicater of overall build quality. This correlation has been noted many, many times. One glaring example is the early silverface Fender amplifier, which suffered so much from poor wiring, excess lead dress, and bad routing that the amps began to have circuit function maladies directly related to "sloppy" assembly.
