yep built one for my 150gallon. Cut eight 2.5 foot sections of 4x4's. Made cuts on all 4x4's to allow framing around the outside, top and bottom, with 2x4's utilizing half lap joints. Secured with Liquid nails and screws finished off with tongue and groove cladding. Final price minus stain and door harware ~70USD for a beautiful stand that will last forever and will hold at least twice as much as you'll need.
Carl
If you have questions post them or pm me and I'll try to get back to you ASAP. It might be a few days though. I'm on the surgical rotation of med school right now and don't have a lot of free time.