I finally decided to enlarge the cherubs. The only way to do it in the end was to trace the original drawing, cut it up into scanner-bed friendly pieces, enlarge it, and put it back together. The new piece is 50% bigger - it looks much better.
Now I'm working out my borders.
This is taking a lot of "hmmmmm" time. The original plan was to place the cherub panel in an architectural context, with a pillar form above or below it...but I can't seem to get that to work. I'm going to go with this border, I think. It's from the same period (Renaissance), but not necessarily the same country. Sadly, my book source for the cherubs does not list it's actual origin, just it's ballpark age. I've been hunting around in all my art history resources, but to no avail.
Anyhoo, I think the wrapped border works well with it, adds a very geometric element to the whole piece. I've traced a small section of border onto my tester fabric, and in about 5 minutes will start inking it in. If I can decide what colours to work with, that is. What's with this indecision today?
Hope your path is always clear,