I received my Mini yesterday and mounted onto my HV30 and discovered centering problem between the top and bottom. Left and right sides are okay but top and bottom is very uneven with the camera angled more towards the bottom. After zooming in to fill the frame, I loose about 1/6 of the GG image at the top.

Is this working as designed? Is there any way to adjust to compensate for this?

If you loosen the allen head screws on the thread ring, you may be able to adjust the adapter to better center the image. The image does not need to be perfectly centered as you will want to zoom quite a bit in from the edges of the ground glass to optimize your 35mm lens. See: http://support.letusdirect.com/index.php?tsrc=knowledgebase&act=45&category=C1