Ha, thanks both of you, funny to see the two different views pop up back to back! It's the nice thing about bonsai, you can't go wrong... Er, no, can't go right maybe?
I'm thinking the biggest problem with the pairing might be that the stone is just the wrong size, big enough to be overpowering, a bit too small for a convincing landscape look. Either that or it's just exactly right. It is a nice rock on its own. I'm ready for some kind of change, if nothing that I like better comes along by spring I'll probably try it out as long as the required rootwork won't endanger the tree. Whatever it sits on can always be changed. Actually there is another stone out there in the yard, that just maybe.....I'll look at that too, show a pic later.