A previous message of mine seems to have not made it. In it I said:
I thought you were suggesting raising the uprights to 90 deg and then raising the lintel on a crib. Looking back I reaslise that you said "erect the whole bloody trilithon to 90 degrees in one go, lintel included"
I've had two drinks already. How many do I have to have before it starts to seem like a good idea?