..Does anyone have a method to easily remove firstly ther bearings and secondly the push rod tubes. I would be very grateful for any advice as I don't want to cause any damage to the tubes or any surfaces...
Adrian, You've been a busy fella! Excellent work and I sure wish I had an unblemished headlight shell trim ring like yours. Those rascals are expensive!
That lower tapered roller bearing on the steering stem is held in place with only a couple millimeters worth of very small splines on the bottom of the stem. As such, a small amount of lift will free it to easily slide completely off.
It appears in your photo that the often overlooked thin metal dust shield is still in place between the bearing and lower triple clamp. You'll most likely ruin this little bit removing the bearing so there's something else to restock.
I bought a steering bearing removal and replacement tool when I did the '83's worn out bearings but lacking that, I'd try a couple hardwood wedges, placed 180 degrees apart, to encourage the bearing to move up a couple millimeters. The wood will not scare the triple clamp but will most likely pop the bearing off the tiny splined area.