I made one and it's working well on my Flint. I'm using it to switch to a long reverb.
I've not upgraded to the v2 version yet but might in the future when I buy something like a Morningstar to control the pedals that support midi.
Yes, I didn't even look at the Cathode of the Led in your first Layout, but I keep being told the Flat side aint always right either but I haven't come across one yet!
Some will argue the resistor comes first!