I bought this a while back to use with my D&G 6" F/15 and a Meade DS-16 Eq head. A friend made a custom adapter for the Meade head. I sold the D&G and the DS-16 before ever using the tripod.
This is how it was described by the fellow who put it together:
"This is a very stiff field tripod suitable for large refractors and Cassegrains. The top of the head is 68 inches high. I designed and built this tripod to hold my Byers mounted 6 inch F18 refractor on Sierra trips. The legs are made of 3” square 0.10” wall thickness square steel tube. These are filled with urethane foam to enhance damping. This tripod weighs 85 pounds and the legs are hinged to fold together. I measured the lateral deflection and it is less than 0.00001” per pound of force at the tripod head (stiffness >100,000 pounds/inch).
The top plate is 3/8 inch thick and has a four hole (3/8” 16TPI) pattern on a 5” circle. There is a 3/8” threaded hole in the center of the plate also."
It is a very heavy duty tripod with enough height for long focus refractors. It really needs a good home and some use. Best if it could be picked up, this brute is heavy!
$350 plus shipping