Side picture to show how close the keyboards can get:
Picture of just the tiers. I created paper templates then cut the wood to match. It's finished with black paint and polyurethane. They just slide into the posts of the stand, and I can remove them at any time:
This picture shows the stand with two keyboards stacked. The top keyboard overhangs the lower one by a bit, but you can see they are very close together. I like the compact look:
Finally, here is a picture from a rehearsal. Pardon the messy wires, as I usually route and tie them down, but this was a sloppy setup mostly for a sound check. The important thing here is that you can see the cord at the bottom in front of the sustain pedal that allows me to open the stand to the same width every time.
