Variegated Habby on Nesodden

A year ago, I reported on variegation on a Hablitzia in my son’s garden on Nesodden near Oslo (see http://www.edimentals.com/blog/?p=18162). I gave him this plant a few years ago and I really didn’t believe it would thrive here as the spot appeared very dry with poorish looking soil, but this year it’s clearly thriving and is sprawling in different directions (they plan to paint the house, so it’s not been trained up the wall). I discovered for the second year running that one of the shoots is variegated, similar to Mandy Barber‘s plant a couple of years ago reported on the Friends of Hablitzia forum on FB!
Has anyone had success (or not) with layering Hablitzia to propagate?
Previous posts on variegated Habbies here (on Facebook):
https://www.facebook.com/groups/hablitzia/search/?query=variegation