Really neat Lemo.
Looks like maple.....birds eye ?
Would require a very stable, close grained species, right ?
Just for perspective, what is the OD ?
Thanks,
RC

Marcel would have you make one 1" OD with a dinky one just like it free and floating in the center. 
What a challenge THAT would be !
Thanks,
RC

.......also, may be able to put it in a tumbler or vibrator finisher for part of the polishing.
jat,
RC

Actually, the 1" od with a couple of dinky ones floating in the middle is not an issue if it can be ABS.... There is a 3D printer which can do that without any problems.
But of course... the real thing is to CUT it out. Not build it up layer by layer in a rather boring process... No chips, just a wif of smelly plastic... Makes it look and feel chinese.
Gotta be wood or metal. Otherwise it has no value.
R

So.......what size are you making yours and out of what material/species ?
Thanks

Maple, about 12-16 inches od.
R

NICE......anxious to see it done !
Thanks Lemo,
RC

I am sure it will be quite stunning when it is done. When are you going to make a start on it ?.

Marcel would have you make one 1" OD with a dinky one just like it free and floating in the center.
What a challenge THAT would be !
Thanks,
RC

I think that Marcel is the one and only person who could make one that small RC.

You're probably right Tweakie, I could hack out a 6' one with my chainsaw  .
Be nice to have in the playground for the kids to climb on.
Be hard to find a piece of maple that big though.
RC

Be hard to find a piece of maple that big though.

Glue up is your friend! Lot's of glue up I might add haha.
Might buy a good planer as well.... Would not be cheap either.
But you would have chips for three heating seasons.
R