Hans not only does a great job, he is a great guy. Never met him in person, but I've dealt with him via email and over the phone. He is a pleasure. He'll do what he says he'll do, at a fair price. And, he'll help any way he can.
When I took a tactical shotgun class, the instructor kept wanting to shoot my 870.
I had him modify my existing 870, and my math indicated that made the most sense. Good luck - you'll like the results either way.