Scrapped the cinder block idea. Went with a 2x4 frame and a plywood top. Here’s what I went with, would appreciate ones with experience to chime in.
-2x4 Frame
-3/4” Plywood Top
-1/2” Plywood Floor
-2 1/2” Stainless steel screws
48” Long x 44” Tall x 12 3/4” Wide
Three Concerns/Issues
1- Should I throw another piece of 2x4 in between the bottom of the legs?
2 - Not wobbly unless you bump into it but I’ll be securing it to the wall in overkill fashion. I’ll be using long toggle bolts through the frame and drywall. I have thin metal studs in my walls. I was thinking 3 per rear legs evenly spaced and a few long screws through frame and baseboards??
3 - My biggest issue is that I COMPLETELY forgot that I have a CORNER OVERFLOW. I got lucky and only the return to tank interferes. I would have to notch out a corner of a left rear brace and leg. Any better ideas? Would a small notch affect strength much? Maybe reinforce somewhere else just to be safe? Bigger black circle and smaller red circle is the hole that interferes. Sorry my proportions aren’t perfect lol.
Let me know what you guys think!