MOTM

>>>>
That is a truly beautiful system!  I'm curious to know if you have 
any problems with the interaction of the knobs and patch cords 
between the two top rows, the angle looks interesting.
<<<<

No, no problems. I chose the angle by doing experiments ahead of time 
with a specific eye to avoiding unwanted interaction. Since there is 
an angle, the jack of course leans closer to the knob below than in a 
straight cabinet. But the angle is gentle enough that it doesn't 
interfere with tweaking. 

>>>>
I also wonder if you will have more dust buildup on the lower row. 
I've found that the vertical mounting tends to only allow dust to 
settle on the knobs which is either kept clean via use or is easier 
to clean than panels. 
<<<<

I keep a feather duster handy and run it over all my gear panels 
every few days. I have many control surfaces that are a lot more 
nearly horizontal than the bottom row of the MOTM.

Moe