I just received a Horseman Convertible that I’ve been looking forward to. However, upon arrival the shutter doesn’t seem to fire. Does anyone have a manual for this camera? Is there any special trick to getting it to fire? I’m assuming you just press down the shutter cocking lever and then fire with the shutter release lever. Is thing at all like certain Hasselblad cameras that need to be fired in a certain order of operations? If any owners of this camera can let me know, that would be great. I have a feeling this one might be going back to the seller.