Awesome news for me - my oil light flicker was caused by damage to the OP switch wire due to rubbing on the belt at the front of the engine. My car was missing the guide/cover for the wiring (cover @ Pelican) as well as the two clips that hold it on (clips @ Pelican).
I haven’t been able to find the thread where these parts (and this problem) were mentioned previously, but if anyone has a link please provide it so I can bump that thread - all the guys currently doing builds need to make sure they’ve got something in place to prevent this issue.