Hi. I have a heavy duty Napier brand pto tractor post hole digger on my old david brown 900 tractor. I purchased a new carbide tipped auger as the old fitted auger had welded steel wear pads and not effective in basalt type rocky soil. I have just found out the Napier is the only digger with anticlockwise drive auger!!!!!

Can the drive gearing be altered. what choices do i have?

jeff