Printing up Reprap Wally parts on my printrbot simple XL. The big pulley and bed brackets were printed vertically as they are just a couple mm too big for horizontal printing. So if you have 100 x 150 bed, you should be able to print a Wally.
Won’t know for sure until it’s built. It is supposed to move quickly.
For me the best part is tinkering with the design after I get it running.
BTW cleaning up the support material on that gear isn’t as easy as it ought to be.