Quoted:
I've used 380 in the past with great success. I'm not familiar with the ones you listed. My friend uses 380 (Black Ma) in his shop for this purpose, and I had great difficulty removing one of these on a 1911 that I was peening the rails down on. I had to resort to using a torch and destroying the stock ejector.
A soldering gun is usually more than enough.
Eventually I am getting it pinned because glued in ejectors suck.
Is the frame drilled for the pin?
Drilling small diameter intersecting holes (especially were the already drilled hole is large and you are intersecting it at the edge) is not always easy.
Even if you fill the hole for the ejector the metal is unlikely to be the same hardness and will make the small drill bit wander.
Drilling from each side with a mill can work, but requires a careful setup.