I have started using the suckers my old Mac apple tree puts out every year. Ive grafted conventional apples trees together using them and along with j. flowering quince as root stock. Grafted pink flowering crab to the mac sucker root stock too. But last year I dug up a few dozen suckers that had various shapes and forms to them. Some had been mowed down everyt ime I cut the grass, so were short with old looking bark already vs the young maiden whips that have smooth bark and have not been mowed. Some I wired and twisted up dramatically. Pics in no particular order taken from this week back to late october just before leaf fall. Im liking how robust these things are and am looking forward to seeing how they develope in my non-traditional way.