What is the lightest Feisol tripod that would "adequately" manage a 10 pound (4.6 kg) 4x5 setup? My maximum is an Arca F-Line 4x5 and minimum is a Canham DLC. Also, which Feisol tripods allow the legs to fold upward so that the ball head is "inside" the legs for storage/transport? Among those, which would be large enough to attach an Arca Z1 ball head? Thanks.