Hi Max,
Sorry to hear about the lost drive. Pat is a great guy and will look after you I'm sure. I have had nothing but great experiences with P&D over 20+ years.
I recently found another upgrade to the drive towers that gets rid of the down-slope of the top shaft and adds double ball-bearings to it. It also provides an adjustable-height tower to achieve perfect chain tension with any sprocket combination.
I don't think it's allowed to post their URL here, so PM me if interested. The parts just arrived so I'll post some pics once I get into the job.
Pete