I misspoke in a prior post. The Ref 40 undercover is always metal and stands proud of the frame, there is no option of a perspex undercover.
You can can get a lot of the benefit of the Marigo footers by dropping a puck of his material under your existing footers and the cost is a couple of hundred. You can reach Ron at marigoaudio@frontier.com
You can can get a lot of the benefit of the Marigo footers by dropping a puck of his material under your existing footers and the cost is a couple of hundred. You can reach Ron at marigoaudio@frontier.com