Ok so I've only made a few Shetland size show carts so far and I got the measurements from the people that wanted them. They were 66" shafts and I can't remember the width between them. These were for max size shetlands if i recall. I have a customer that has a 40" pony and feels 60-64" shafts are what she'll probably need. I'm guessing since a 40" pony isn't a whole lot bigger than a Mini they probably aren't going to need a whole lot wider. Can anyone tell me what their carts measure shaft length and width Please??? Also what size pony you use it on.