Just a humble suggestion.
From going from the Manfroto and fancy head which was too heavy though served well for spotting I have the following suggestion.
Component #1: A decent sturdy inexpensive camera tripod. Dig around the rack for one that passes your test.
Modification #1: Trash the tilt/rotate head. What's left should be a 1/4-20 threaded hole. Make a short stud from a 1/4-20 screw or all thread. Cut to length that leaves sufficient length for attaching the next component. Devcon/cold weld/JB Weld the stud into the tripod.
Component #2: A Handy-Vise. The type that is used for mounting PDAs on the dash board or something. Disassemble the unit and clean the ball ends. Lightly lube with a light grease. I rigged mine up at camp and was forced to used Bag Balm.
The handy-vise will screw to the tripod stud.
On the other end, top, of the handy vise design and mount a transition piece to mount the scope holder. Again I was in camp and rigged a small block of wood, mounted to the handy-vise with 4 small screws and another 1/4-20 stud.
Adjust the tension on the handy vise to that it pans and tilts to your liking.
It sounds pretty chinchie but was nearly perfect and was actually more useful and handy than the expensive rig.
The field craftsman was sufficient that I doubt I'll make any changes. Its light, compact, solid, rugged and fits well in the pack.
Oh, and its inexpensive (read cheap).