Hi RickM
I've just built a delta to my own design. I have previously built a Huxley and a 3DR. The 3DR is a super design but I found the build bed a bit small. There is a post with some pictures of my design, a Cherry Pi, further down the posts. You are more than welcome to my .stl files if you want them. I know I'm biased but it's a terrific printer and you could build it very cheaply given you have the bits from your I3. Just a few pieces of aluminium extrusion and some bearings, GT2 belt and pulleys, nuts and bolts. I use a 300mm granite chopping board as my build base with blue tape. It would be really easy to add a heated bed as all the electronics are in the base. My design is probably more kossel like than anything else but uses cheap Bosch rexroth extrusion and cheap 623 bearings (18 of them). I used magnetic rod ends but designed the rod carriers as a separate plate on the bearing housing so it's easy to use any rod type with a minor change. The rods use cheap 8mm threaded ball ends and 10mm countersunk rate earth magnets.
Good luck with whatever you finally go for.
Andy
I've just built a delta to my own design. I have previously built a Huxley and a 3DR. The 3DR is a super design but I found the build bed a bit small. There is a post with some pictures of my design, a Cherry Pi, further down the posts. You are more than welcome to my .stl files if you want them. I know I'm biased but it's a terrific printer and you could build it very cheaply given you have the bits from your I3. Just a few pieces of aluminium extrusion and some bearings, GT2 belt and pulleys, nuts and bolts. I use a 300mm granite chopping board as my build base with blue tape. It would be really easy to add a heated bed as all the electronics are in the base. My design is probably more kossel like than anything else but uses cheap Bosch rexroth extrusion and cheap 623 bearings (18 of them). I used magnetic rod ends but designed the rod carriers as a separate plate on the bearing housing so it's easy to use any rod type with a minor change. The rods use cheap 8mm threaded ball ends and 10mm countersunk rate earth magnets.
Good luck with whatever you finally go for.
Andy