after talking several times to the machine shop guys and checking stock at central we came up with the following design for the two beams supporting the vacuum chamber including thermal insulation. The main requirement was to not raise the beam height too much to not make everything to unstable. We also can only raise it about 1in before reaching the upper limit of the existing periscope. The current design adds 3/8" of height from the beam plus additional space below (~1/4). The width is designed to accommodate a second thermal insulating box around the existing setup if required for more stability.