The static line joining the flight instruments was installed and the sub-panel then plumbed into the aircraft. Connecting the vacuum lines, especially to the Artificial Horizion, required getting in behind the panel which meant lying upside down in the seat and sliding up between the spar and panel. After two hours working behind the panel, sitting properly in the cockpit it now seems quite roomy. There seems to be no need to check the remainder as no movement was noted. The same was noted on the intake manifold nuts.
Magneto timing appears unchanged and correct.
Valve gap adjustment was found to be a bit too tight. I am unsure as to why this was required. It could however explain why the engine began to get rough as it warmed up. On the next test run the engine was run for about 5 minutes. The engine stumbles as the power is increased indicating it is likely too lean.