Hi Erik Lund,
As a first time owner of a PC NIKKOR 19mm f/4E ED, I was delighted to see the good idea you posted in late 2016 about using a modified LC-K101 with this lens. I have located an LC-K101 and will be trimming it shortly so I may use it with my PC 19mm.
I noticed it falls off the lens when bumped slightly. And I see you mentioned, “It will just need a tiny trimming to lock at the right point since the original lens cap LC-K101 has a small locking hatch.” I’m assuming the hood falls off easily because I have not done the tiny trimming yet and that must be why it does not rotate on very much.
Can you kindly elaborate a little about how you did this trimming? Was it to both sides, or just one side? Does it correspond to where the latch is on the lens cover?
Thank you much.
Tom