Ooooh, those are some nice, devious ideas! I could probably rig something like that, or similar, with the fucking machine inside the cage and the last leg of the machine with the dildo pointing straight up under his ass. Or I could use the bondage stool with the dildo jack mounted underneath it, but then that might give him a place to rest and/or it might get in the way of him lowering down more to give his stretched balls a rest. But I'm sure I could figure out some way to rig that. Now I just need to get him back here for another round of play. It's a long trip for him to make, especially just to be abused in my playroom. If only he owned a TARDIS! ;-)