Yours was probably the dolley I based mine on. I looked through TBN to find the picts for the post and couldn't.
Mine attaches the same way as yours.
A single swiveling wheel may seem less moveable, but because you don't get into the situation where two wheels are pointing in different directions, it actually makes it pretty easy to move. The weight makes all the difference.
Also, big solid wheels help moving a lot, and having only one front wheel makes it easier to steer. Mine are solid metal wheels.
I was always very impressed with the workmanship of your dolley.