Thanks everyone for the nice comments.
Zuki, I often run the keyboard directly into the Bose. It works great. It is best to use both left and right sends into two channels on the Bose Model I. On the new Version II Bose, there is a stereo input on the T1 mixer, and I run into that when I use it.
I run everything flat on the Bose-preset 00, and do all effects and e.q. from the keyboard.
I do have a mixer set up now at the club where I work just about every night. That allows me to leave everything for Hank or whoever fills in for me to use.
DonM