I now live in NZicon (18 years) I so miss a decent pint...
Main reason stopping me from moving abroad. One day my home brew will taste less revolting and I'll be off.

Regarding the extra contact at the mid point, I thought one of the main benefits of the No4s over their predecessors was that it only had contact and pressure at the muzzle end?

Not speaking from experience or having tested what you mentioned but I can't imagine any target shooter having wanted a less free floating barrel.

Keeping mine std as well. My No4's not exactly rare but I like it being as original as possible.

Sorry for any typos, been out investigating more into why our beer's warm.