I did. Quick story about that. When I got the trailer back home, my father-in-law did a double take. For some reason, he thought I was buying another cub cadet. Anyway, he was out bush-hogging with his Ford 800. He asked, what do you want to work on first? I told him about the stuck clutch, his response "Want it unstuck?"
"Sure" was my response. Here's what we did. We hooked a towing strap from the front of his Ford to the Front of the 154. With him going backwards, he pulled the 154 with it in 3rd gear, two pops of the clutch later, it was free.
In driving it around, I found that the tractor wanted to go even with the clutch down. If I also held the brakes down, I could shift from gear to gear with the engine running. As Joe found, there is still slop in the clutch release yoke, but the major problem was the clutch brake was completely out of adjustment. Once I made that adjustment, I'm pretty sure I can drive it now without needing to hold the brake pedal down to shift.
Currently I'm replacing the leaking fuel bowl and setting the float on the carb as it is flooding right now. All in all, I think it should be in good shape after this work.
I'm still sorry that Joe didn't get this to work for him, he was really really close, but I'm sure the clutch pushed him over the edge. I suspect it would have me too if I had done all of his work and didn't have all the bugs worked out.