Along the "lines" of discussion of underhood items, particularly the valves that connect the lines to the compressor (including the associated caps)...
What are the best options? Replating the valves, buy the replacement caps? Buy new valves & new caps? What have others done with these details to keep it "easy", keep expenses to a minimum & yet get the best results along Concours standards. (Yes, the default/safe answer is "Restore your Originals", but what are best alternative options)