I should note that these plans aren't fancy, and they don't have much of a way of mounting the yoke to the sled. Late in the manufacturing, I had a 1/4"x20 thread added to the center of the "Base Block" part, which I know a lot of people used. If you can get it the yoke made, however, I'm sure you can find a way to get it mounted to your sled.
I still think the Marshall 651STX is one of the better low-cost monitors, and while I do get Cinetronic envy whenever I see one of their monitors, my monitor has paid itself off many times, and I've had no issues with it. I can't imagine using it without a yoke ever again though, and if you own one, or make one, I'm sure you'll understand.
All I ask, if you make one of these and use it on your sled, just send me a picture of it in use. I love seeing how far these things end up going!
A few technical details, for those inclined to build this:
In terms of how the assembly actually works, you take 2 of the "Side Blocks" and bolt them to the "Base Block". Then, you bolt the two "Monitor Blocks" to the sides of the monitor with 2 4-40 3/8" long countersunk screws. A 1/4"x20 5/8" long bolt then goes through the side blocks and into the monitor blocks. The 1/4" bolt (the pivot) has a spring washer and a 1/16" thick Nylon washer on the outside, and a 1/16" Nylon washer between the side block and the monitor block.
Hopefully that makes sense. See pictures here for more assembly details: http://www.willsvide...parts/Yoke.html