Post hole diggers on 3pt hitches is about the only PTO thing that scares me after having one snap the U-joint and shoot past my shoulder - probably had something to do with the PTO being in High range
Looks like I can rent it on Saturday after 4 pm, till 9 am on Monday. I should be able to get 34 holes done by then, Id think...
Down pressure is your friend and the dingo will have some. You would have some nightmare ground to not get 34 holes dug.