Sorry it took so long to reply... Been working dirt to fill in a pond, and wanted to get as much done, before the rain came...
I measured the scissor lift this morning... Using the picture I posted for reference... The double arms are 30" in length. This is just the arms, not including the cross piece..
The center arm is 25", not including the cross piece...
The hinge pin is 9" on center, above the cross piece on the center arm. And 15", O.C. of the 30 inchers... Looks like a 3/4" hingepin.
Didn't think to measure the width of the drawbar part. Should be able to get some measurements from any 3 pt. implement you have... On the end where your spear, or carrier hooks... Just remember to make it narrow enough to fit inside what ever your using, and allow room to clear... Bolts are used here, as it is impossible to use pins like on the other end, because it is in a fixed position...
I also didn't get the degree of angle on the tabs where the implement attaches.. I can get them after the rain lets up.. Plus the length of the toplink attach point. and length of the tabs...
Hopefully this will be enough to get you started...