Nikon F, F2 Flash Contact Spanner Tool?

My 2 free Nikon F repair practice bodies came, and getting the worst one with the damaged shutter curtain stripped down, worked out pretty well. But I can see I'm going to need a proper tool to remove the flash contact at the back of the rewind knob. I already know where to get the one for the slotted spanner nut down inside the shutter button shroud. But I got that one out without too much scratching without the special tool. But that slotterd spanner ring on the flash contact... no way am I going to CLA my 3 mint F's till I find a tool for that flash contact. I had to use needle nose pliers on the junk parts body and chewed it up good. I've seen a small socket-style tool the Japanese guy in the youtube video was using. But I could likely get by with a extra small adjustable spanner wrench if I knew how to find one. That dadgum flash contact was tighened in there GOOD. I liked to never got it out.
As for the second body, it has a bent finder retaining bracket, which I'll be swapping out of the junk body, but that second one works perfectly. I'll be able to restore it without too much trouble at all. But I really need a flash contact removing tool. Any ideas? Thank you.

The original factory tools were never common, and many only work on one specific model of camera, so you'll probably need to get creative. Richard Haw mentions this in his Nikon F repair blog.

It's been awhile since I've serviced my own F, and at the time, I don't think I had learned enough FreeCAD to design + 3D print my own tools. So I may have relied on a home-made flexiclamp-type wrench similar to Fix Old Camera's. Unlike FOC, I used aluminum or fiberglass (actually epoxy circuit board material). Flexiclamps are great, because there's little chance that the tool will slip and scratch. Sometimes I'll get lucky, and an existing tool will work on a different camera, but it doesn't happen as often as I'd like!

I've got 2 or 3 different H-spanners, but these are really designed for lens retaining rings, and I find them super-awkward working with small diameter fasteners.

Nowadays, I also have the option of designing and printing a small pin spanner pretty quickly. PLA plastic for the main body is plenty sturdy for this application. Pins are brass or steel wire. To date, all of mine have been camera-specific.

Well, the worst of my 2 new practice bodies is back together. This one is unusable due to a bad shutter and too many missing parts. But it made a great practice body to find out my weak areas in service technique. The second one in the foreground is the other body. It works fine and is only missing the bottom comer and has a bent finder retaining bracket, which I stole out of the first junk one. Camera 2, the good one, I won't refer to as junk. Just needs me to install the new bracket, give it a nice LA, and 3D print a bottom cover. I'll be ordering the tool for the shutter button shroud, and get a proper oil dispenser. I know what I'm doing now to avoid the scratches and chewed fasteners from improper tools. I tell you what.... getting those 4 left hand thread screws for the finder bracket out of the mirror box and back in again is some mighty tedious work. But I decided to swap the bracket only, rather than the entire mirror box. If I swapped the whole mirror box, there would be no way of knowing the focus accuracy of the camera. Cameras are factory adjusted and no 2 are exactly alike. You can't start swapping things willy nilly without throwing the whole thing out of adjustment. Waiting on the tool to come will give me a window to finally align the Revox I built out of junk.

What's the best thing for an oiler when working on these cameras?