FWIW, I am using the ebay 3-arm yoke in a Larin stand. The fitment is not perfect. It's a little loose for my taste. However, I have a teener engine on there now and it is very stable, even with just the friction fit.
If I run into issues with fitment later on, the plan is to layer a couple aluminum can outsides in there and call it good. Not a perfect setup, but it's getting the job done.
I got my yoke with the bench adapter, and the plan is to weld that on my custom build/run stand in place of the existing empi POS that's on there now. That will guarantee a better fit. I don't have a welder at my disposal (yet), and the Larin stand is getting it done.
Here's the Larin stand I'm using. I got this on sale with a ship to store deal for half the listed price.
http://www.pepboys.com/product/details/454...OnlyStore=false