PH - leaving aside the discussion on photographic analysis capabilities :: you missed (and I didn't explicity state) the main point of what I said - I can't see a good reason NOT to put the information out, since it can be ascertained fairly easily. Basically - I was
reinforcing your comment that the information
should be put out by the wb makers
(at least the items of weight, outside dimensions, base plate thickness, flow rate at a specified pressure, mounting method, and mounting pressures).