I almost built a bottle cart just like yours (until I came across the storage shelf system that I used for my welding cart).

I requested some plans online to build a very similar bender to the one you have, but I'm not sure that I want to go through all the work to build it when my neighbor offered to let me use his bender. I think that upright design is a much better arrangement (for saving space) though. It looks like your bender allows you to produce some very nice projects! It's even better than you can produce your own dies. What type of steel did you use to make your homemade dies?