As mentioned, a serious pain. On my old setup, my technique was to use a Phillips bit with a 1/4" wrench (most bits are a 1/4" hex). Use a flatblade screwdriver against the end of the bit to hold it in the bolt head, turn it with the wrench. They're not all that tight. Might not work with your setup though.

My new IM sits the TB far enough out I can just put a screwdriver on it. I was so happy when I found that out

Glad to hear she's up and running!