Hey Ian, as you know and saw I am a fan of the Archangel stock. The adjustablity of the LOP and cheek riser are fantastic and it just has a nice feel to it. Fit and finish are great with just a little filing and sanding to fit the Norc chassis. I myself did notice an improvement in accuracy, now I dont know if it was directly related to the stock itself being more rigid or if the stock just fit me that much better that I myself was able to be more accurate. Either way Its a winner for me. Weight is substantial but IMO this particular stock better suites a bench rest style of shooting so it really didnt effect my choice.
ps, how did that CASM mount work out for you?