OK, now I've chickened out about chopping it. I would hate to cut too much off. Brian's advice seems reasonable - reduce the shoots and give it another year. Just repotting will be a big enough project for now.
But...I feel like I could change my mind again any minute now. With the 6:1 height ratio law, my 5" dia. trunk means 30" or less for height. I could see chopping at Mike's red line too. What to do, what to do.
Maybe the nebari isn't as bad as I thought. We'll see at repotting time.
Those aren't suckers in the pot. They're cuttings of Rhus integrifolia and something else (I always think I'll remember what things are so I don't make labels, hah). If I do find any suckers though I will remove them.
Thanks for the advice!
Sharon