I purchased a used Arca Swiss Discovery recently. It is a very fine camera and a pleasure to use in the field (although more of a hassle to schlep around than my Wista DXII). I would like to get a compendium shade for it, but $640 is too much for a camera which cost me $900. I saw a reference to Canham making a compendium hood ($300) which can be used on the Arca. Does anyone have familiarity with this hood? Quality? Flexibility? Work well with the Arca?