The CD I made for a4.16 did work to boot me into my VL7a4.15 partition. I didn't install 4.16, just booted with it.
A successful boot, but...
For some unknown reason, my XFce was totally messed up. No icons were showing. I could not change the background image. I did VASM, skel to restore to defaults, but still no icons and the background was unchangeable.
I didn't know what else to do, so I booted into VL7 a4, which has been working well enough to use it all the time (which I do). I do need Inkscape, however, and hope it will be available for VL7 soon.
If anyone knows how I can fix XFce a4.15, let me know and I'll give it a try. For now, I'm back to a4 and will stick with it until beta1 unless we get an a4.17 (hope not!).