Just went through and configured 3.3 for an IDM 4.5.2 install.

Much easier than I expected! Well done! Lots of neat new features in
3.3 that I like.

I did miss a few things that were listed in the docs, but simply setting
the proper settings from the docs, around this link:

Specifically for OAuth, then set the needed matching values in
Configupdate and it just worked with Oauth. Very nice.

Overall, thumbs up!