Sanwa M17 - where is steering reverse & how to assign gain for drift gyro to a trim switch

I am sure there are better videos for this, especially outside of those in english, but I struggled a bit figuring out how to get these settings done on my new Sanwa M17 coming from a Noble NB4. They're both weird and actually pretty great in their own "once you understand how they're thinking" sort of way. The reverse is _actually in the manual which blew my mind when it had a cromulent index, however I had more trouble figuring out the gain assign thing.

[@sibzilla]

Thanks for this fella. Very handy! :)