That looks fantastic!! What is emt conduit? Is that the stuff with holes in it for suspending electric pannels?
EMT couduit is the thin wall galvanized steel tubing used to run electrical wire through. It is available at all the home stores, I get mine at Lowes. Pretty cheap and a good source for light weight steel tubing for projects. I usually spray the weld joints with either Cold Gal which is a zinc spray paint to mimic the galvanizing that gets burned off in welding it, or aluminum spray paint. If I had it to do over, I would make it both taller and wider. It still has plenty of room for starting seedlings, but I'd like to be able to grow more variety in winter. I just finished laying out a PVC watering system that the wife saw on a gardening program. I'll shot a couple of pics and post them as soon as I get a chance.