I have done what I think is a respectable amount of MYOG: ground covers, tarps, even a backpack.
What I have done the most of was stoves. Back when I was still heavy backpacking, I would lug the full Swedish Triangla stove set out. Don't know how much it weighs, but I would guess over a kilo. Then when I got into lightweight, I made lots of different alcohol stoves: tea light, soda can, cat food can, and a few experimental ones of my own design. In the end I was the most happy with a Triangla burner in a modified pineapple can pot stand, but this is bulky and heavy by UL standards (over 300g if memory serves), not to mention that my Ti pot is too small for it. I was also pretty happy with my cat food can stove with tin foil windscreen and pan, it fits my Ti pot, and clocks in at about 180g total for everything, which is pretty good if you ask me.
But there are issues with both that I never worked out. I could never get a boil time under 6 minutes, usually more like 10 in the field. Lots of soot with the Triangla, and the cat stove set up is fragile and I had to replace parts often (especially the windscreen).
My stove set up was the one part of my gear that I was not entirely happy with, and after over a year of MYOG building and testing, I threw in the towel. And I figure after all my struggles I might as well go all out, so I threw down for a full Ti Clikstand stove set up.
At about 230g, that's only around a 50g weight difference. If it is as easy to set up and burns as well as the reviews I have seen, plus the all-around awesomeness of Ti, I could give a hoot about the weight difference.
Who else has a Clikstand, and what's your take on em and/or how you like it?
And as a follow up, what MYOG projects have frustrated you enough to just buy the darn fancy gear?