Okay, so it's in compression rather than tension but what is it actually bearing against? Is there a shoulder?
I mean, you have to access the end of the rod with whatever adjustment tool it requires...
How does the rod exert a force on the neck though? I imagine it to be secured at one end and that the bit you turn acts like tightening a bolt...
I've never actually seen the end secured however. Is there a little tee slot or something?
My mum and dad lived in Twickenham for a few years and I learned of some of the island's history from that. Trevor Baylis (of the clockwork radio) lived on the island at the time.