Well, I've updated to the v16 Tetsu kernel!!
So far, so good. I already had the Big SD driver in place, and the upgrade retained it!
When I reboot, there is a lot of scarey looking stuff that scrolls by saying such things as "cramfs: wrong magic", "FAT: bogus logical sector size 480", and about a dozen somethings about "Inode # (5 digits) was a directory with children - removing those too".
In spite of these objections, the kernel boots, and everything (including the power button) works fine.
The only thing I would like to change is that it boots with the 530 Mhz clock speed as the default (called a "163" by qclockchange). Can I change that to default to the 241 setting (200 Mhz for run mode and 400 Mhz for Turbo mode)? If so, where do I change that?