As OLG stated, the fit and finish on the Miroku 73 is outstanding. I've handled one in the store and on the range. The competition model out of the box has a shorter stroke, like the Uberti comp model. It's stiff, but very smooth. I handled and shot a slicked up model (done by Cody?), and found it was a slick as mine done by my smith. I've had that rifle in my cart more than once. The only thing that stopped me from pulling the trigger is parts availability. The mechanics are similar, but the actual parts are different (firing pin, I heard maybe the carrier?).
You could probably run it hard for years and it never break. YMMV