Back again, and belated Merry Christmas to all, and preemptive happy New year!
Josh, ^^ I'd be interested to learn more about that marker.
To the previously unknown details about the mini, and toward Josh's suggestion of a full calculation, finally pulled the guts and here's what we have:
Hammer spring - Gardner 36461GS stainless precision compression
OD- .480
Wire diameter - .038
Free length 2.00"
Rate (lbs/inch) - 3.7
Inception heavy hammer (plus cocking rod weight) - 58 g / 2 oz.
CCM valve open height (based on wear marks) - ~.117*
Hope this helps refine the picture so far.
Thanks again, all!