The PCB now has the AD797BRZ & L49990MA op amps and the shunt feedback resistors changed from 560 to 390 Ohm. I mounted the large Mundorf Supreme Caps on a paxolin board which in turn stands on a pair of M4 x 17mm Nylon pillars. If you look at the top picture you can see the two extra holes I drilled through the board to fix the pillars. I also had to looze the PCB mounted terminal block for the power connections as it is inaccessible, so I soldered leads to the board and have an in-line terminal block for easy disassembly.