I'm currently using a RRS L bracket the bottom attachment position to the body of the H fits perfect but...even with the accessory spacer from the HTS it won't allow free movement to turn the HTS the Knobs get in the way, you can turn the HTS so the knobs are on the top that's the only position to access the knobs freely.
The L bracket remains on my H body at all times with the spacer for the HTS because my left hand can hold on to the L bracket using it as a handle. The spacer allows the L bracket to drop down away from the bottom of the camera giving a somewhat comfortable left handle.
I have spoke directly to RSS and sent them pictures of the issues but they have no plans to remedy at this time. My question is anybody using the Arca Swiss L bracket it looks like its adjustable to some extent can you hold the Arca bracket as a handle? Does it have enough room to swing the HTS without cutting off your fingers? Does anybody have another solution (some available L bracket that will shift the camera with the HTS attached forward away from the Arca Swiss Quick clamp on a tripod head allowing you to rotate the HTS and be able to turn the knobs while the camera is in the vertical (portrait) position? Shooting stitches in landscape position is very limiting in the height of the image I rather shoot portrait position eliminating most times the need for multi row stiching. I can understand why Hasselblad wouldn't solve this whole debacle themselfs and have produced a simple bracket to fit seamlessly with Arca Swiss type compatibility.
Any help or partial help would be greatly appreciated maybe there is an easier solution I'm not thinking of. This whole left hand thing started when I saw a fashion photographer with a wooden handle on the left side of the H body allowing her m to turn the camera with ease ans shoot portrait I th out it was a great idea!