Adding to what I mentioned , If you do construct a support make it so a tray or print washer can be outside of the sink and draining into the sink. I can't really tell what the dimensions of the sink are nor what maximum size trays you will use. For archival processing you would need room for five trays (if toning after the wash - six if before). There are "tray stackers" available if needed. I need them when going 16x20.