Amelanchier on Sorbus / Pyrus rootstock?

Just took out some potted baby Amelanchier from their winter hide under a pile of leaves. Three of them had all the lower bark eaten by our neighbor rodents, leaving dead stumps but living, though a bit dry tops. Is there a possibility of these tops doing all right on any Sorbus? I have Mountain Ash and Sorbus Intermedia (Swedish Whitebeam?) growing around the garden. I mean to use the tops as scionwood, grafting them to Sorbus rootstock. Has anyone experimented with this? From what I’ve read, the other way around seems to work, at least using Amelanchier as a dwarfing rootstock for pear?

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certinly worth a test.