It would be nice to put a fitting at the bottom and route to your dipstick tube, so you never have to empty it.
Wouldn't that put water in your oil? I guess some gets in there anyway but I wouldn't want to add more.
I have the same set up. Used the bracket that came with the catch can and an old 90 degree bracket from an FJ60 air cleaner to mount it on the charcoal canister bracket. I like having it mounted in a solid spot.