The rigidity of the system is paramount. The plate we use is quite long and really likes a lot of bearing surface It slides into the tripod head. In the future, I will use ADL type stocks and machine a flat into the bottom of the stock and screw/epoxy the plate on. That isn't an option this time. Silver soldering is not a good option as it requires a lot of heat over and extended period which is prone to migrate to the areas that need to maintain their current heat treated state. TIG welding concentrates the weld in one small area and will be the best option.
