Vance Wood

Personally I think the caliper of the trunk justifies taking the time and effort to try and develop some new roots. Try the layering idea again but this time pack the base with pure sphagnum moss and then anchor the moss down by putting a little soil over the top of it. I think there is a good chance the tree might root in the sphagnum. This may take a couple of years, but its not like your looking at retirement next year. A ten year old trunk; I would not toss it out without a second thought.

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The only finished bonsai is a dead one; me 1992 MABA Des Moines Iowa