Buffered ABY+silent Tuner switcher

[fabiomayo]

Hi, everyone. New here, been lurking around for a while.

I've been meaning to build me an amp switch. Here's what I've made so far,
can you please take a look? The PCB worries me, especially the Vr trace that
goes around a lot of the other traces. Traces are bold (2 mm).

Below is a drawing. The box pictured measures 13 x 15 cm (5.12 x 5.9 inches)
but I managed to narrow it down to more 'standard' 5.1"x5.9".
The first footswitch selects between a buffered tuner out (silent) or the
amplifiers outputs. Then there's the usual ABY switching scheme: A or B on
one switch, and both A+B on the other. The B output has a phase switch to
choose between a inverting or a non-inverting buffer. Buffer circuits
come directly from AMZ website. http://www.muzique.com/lab/buffers.htm



Here's the logic scheme:



Will it work?
Thank you.