The only problem with the Morgan was the camber "increasing" on the nearside which Rhys rightly red flagged me for. On examination it proved to be a combination of not being able to pull the wheels up tight (I thought because the washers were binding on the outer races), and me going quicker. Having just unloaded it I found the washers were actually bearing against the hub, not the bearing outer race, so the play was increasing as the hub wore, solution make spacers to replace the washers, a length of 3mm wall tube is on it's way.
The log book seems like a good idea, my thoughts are just a sheet on excel to fit an A5 binder, with columns: date; problem (fault possibly); action taken. I'll knock one up for my use shortly, and share it here.
As for the grub screws not holding on the axle, one solution is to position the bearing, lock up one screw, and spot drill the axle about 3mm deep, replace the grub screw with a dog point one, then repeat for the other one.