One last note-the last person who made some of these spent $450 per rack-which is about what I paid a for materials and labor 20-25 years ago for them.
I own 5 of them now. I had one in a shop that sold about 20k a year off of. This tracks really display work well for sales.That shop changed hands and I took my rack out and only sell limited forms to now as I'm not very happy with current owners. I have been in that shop since 1975.
A few other nots is I suggest staying away from using ash as it attracts moisture and can mold easy. The maple or silver maple is super tough. Any hardwood plywood will work but birch is high colored and all plywood shelves need that strong back glued on from for support.
This units fold flat and shelves stack flat into themselves for travel. All the pegs are on the rack side not shelves except the mug rack which has pegs on it.