as i say i got some one else to do the hard bit of boring out the new pinion, i have a lathe but not the correct tooling so thought just take it a get it done as i was loosing patience with myself and it. I was concerned about hanging a big nema34 off it but they are supper solid its just a shame they dont do them in a metric option. If i do a 8x4 build myself i would get two more defiantly.