After grafting scions; have you tried rooting your rootstock stems?

[wdingus]

This year I had some luck with M-111.

Rooting from Cutting/Burr Knot style Apple Trees

I’ve tried rooting the cut-off portion of M-111 rootstock multiple times over the past 4 or 5 years. Typically none or occasionally one might root. This year I scraped at the bark far more aggressively. Stuck 7 in pots, all 7 rooted and I’ll hopefully graft onto them next year. More or less perpetual rootstock that way I hope…