Thank you @hotsoup. Most useful, and well written.
I have been hanging out for the 'full zip' version of the Rifleman which was apparently imminent late last year. Like some others on here I struggle with overheating (probably caused by overeating!) and I have 1.5 munted shoulders....so not much of a contortionist and strongly prefer clothing that opens fully. I figure from what you have found with the currently available version it will serve me well.
Cheers
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