UPDATE:
while i cannot speak to the longevity of this design i am ready to tell you that the proof of concept is a HUGE SUCCESS
this is a bulb. beccarii cross i mounted on sept 14...this is from early November...
Untitled by
J Solo, on Flickr
a second new growth
Untitled by
J Solo, on Flickr
underneath you can see where a lot of the existing roots have started to grow in to the mount as well
Untitled by
J Solo, on Flickr
i think that adding a dowel or some lengths of bamboo in the core will make this a home rune bc then it should not degrade or lose its integrity for a long while