Correct
I use Suntour XC Pro, but I tweaked the cage a bit using a stainless steel soldering kit and pieces of stainless steel to improve shifting. I added a piece of sheet steel to the inner side of outer cage, in the middle, to improve the downward shift from the middle to small ring. I added a piece of sheet steel to the bottom of back cage, to improve the upward shift from small to middle ring. The downward shift problem is there because the seat tube is of a large diameter and the derailleur cannot go far enough in. The problem should be there for any folder with a large diameter seat tube including Dahon and Birdy. The upward shift problem is there because of a large size difference between small and middle ring in my 20-32-50 setup. I must say that one could get an OK shifting without cage modification, but with the modification the shifting is more robust - no matter what you do, it shifts fine.

I think you refer to the second kickstand, folded in the photo. I use a Kamoya center-mounted kickstand.

https://www.kamoya-ne.com/?pid=51274909

All my 3 shifters are indexed. Yes, indeed, but the mountain drive would add 1kg of weight or something close to that. At this point I am fine with the gears , but @pastorbobnlnh has 54 on his Dahon !