The advantage of buying from Tom is that he may have an original; all else being equal an orginal should have the best chance of an easy fit. Ejectors, like all Luger parts including orginal parts, sometimes fit and sometimes they don't. Manufacturing tolerances were different then. Be sure to tell Tom your model year. Plus it's just more fun to shoot these with orginal parts.
I appreciate you posting pictures. A lot of times people ask for help on function and we never hear from them again, not knowing resolution.
For a one-time install the only "tool" that I'd suggest would be a popsicle stick, used as a pry-bar / shock absorber. I prefer Hagaan Daz but likely other brands will work.
