Beautiful. I still want/need a shelf for my amps, and as you said there are no commercial ones really. I'm also in contact with a carpenter / studio desk designer, but I am afraid of the price already :/
I want the amp-shelf to look more like a rack/desk and place it across from my studio desk (you know, like those big racks behind the engineer) because I have no room left at the walls. Originally I planned to get a speaker patchbay and some unit to "patch" the amps, too but it was way too epensive. The Radial JD-7 looks great but it's ridiculously overpriced imho.
I've been thinking for ages to make some rack shelfs like those but with wheels to move the amps between the control room and the recording room.
Although a carpenter always told me that it was easy and didn't need any special reinforced shelfs, I was always worried about the shelfs bending and possibly braking with the amps weight
Do you know what's the thickness of the shelfs, and how they're attached to the sides?