Man, just lift the machine up with the hydraulic and articulate away from the tree and set it down articulate the other way, and do it a again and again til you are free...... same as in a ditch or sunk in the mud...... jim
I had read your post earlier (That's actually what helped me find this forum -- thanks for the advice!), and I tried that solution for a good long while this time. I just couldn't get the front end to stay put once I lifted the mower to articulate the other direction -- it just kept sliding back against the tree. I think slope+loose, wet clay dirt just prevent that from working in this specific situation. Still, I can see how that would work with some grip, or some uphill assistance from a static anchor (tree, deadman, etc.).
I'm sure I'll get the chance to try your solution out again. =0)