I just realised i have made a big mistake in my logic concerning the megalithic yard.
I have always thought it sits above the imperial system as base 99 imperial against base 102 MY.
It sits below as 275 imperial to 272 MY.
Now that this is understood a great deal of material falls into place
Edited 1 time(s). Last edit at 25-Jan-18 07:14 by DavidK.