Hey Theo,
Thanks for the pic. Very well put together. Those blocks even look sanded on the edges. Your system of adding wheels is well thought out. It also saves on wear and tear on the machines themselves when they get moved as you don't have to shove and yank the machine, taking a chance of damaging or denting.
I like the clean geometric styling of your appliances. So reminescent of styles we had here in the late 70s and 80s.
Another question for you. In your first pic there appears to be a basin between the washer and dryer picture and on top, what are the bars and the blue form fitting piece on that? looks interesting.