Remaining completely neutral here, but I just pulled out the relevant issue. Mike Pitts seems to have decided to run a whole series of 'alternative'/ provoking letters, Garry Denke makes an appearance "Stonehenge Armageddon Prospect",(1st April 1985).
Stonehenge representing the glyphs of the zodiac.... and eeek.... a worthy metal detector; plus a leyline letter "tracks once radiated from Fowler's Arm Chair stone circle"
And a beautiful opening line on Silbury "I often travel past Silbury Hill, now that my sister lives nearby, and every time I go by I wonder what it was built for"..
Sadly he is spoofing alternative theories, not unkindly because there is a place for different viewpoints in this world, due to time I have'nt read your theory but I suggest you just keep fighting the cynics ;)