Got my second head basket today for the H47t with an HM7 capsule in it. I originally ordered my main head basket with an HK47 in it. I got the HM7 in a chrome headbasket (matte for the HK47) so I could tell what's what in the heat of the moment...
Matt from Heiserman walked me through swapping the head baskets and it's super easy to do and only takes about a minute - or two. Just three screws, a slight wiggle, and the basket is free and ready for a swap. Putting on the new head basket was just as easy - the mechanical design and production is very exacting, and everything lines up nicely.
Typical Heiserman quality. Great build, esthetically very pleasing and great customer service.
The capsule sounds as I expected. In comparison to the HK47, it's a little "warmer" and more "vintage" sounding. Both sound great. The HK47 MIGHT be a tad bit louder / bigger, but then again, it could have been me too. I'm not a singer here....
Anyway, many thanks to Eric and Matt and everyone else @ Heiserman for a great and very versatile mic package. With the two capsules, this mic will cover a LOT of ground, and both options initially sound great. More thoughts as I actually get the time, and opportunity to record more with them.