It works! :champagne: :carrot: :yay:
Really simple error on my part. Turns out that the positive lead to the internal binding post had a weak connection (found with continuity testing). Resited and resoldered and all is good.
Been playing for 30 mins or so and sounds absolutely awesome. Using my goto album (DR =21) and speakers just breeze through it. Lesser speakers wimp out on the more difficult areas.
Next steps: redo the other xover, clean the main drivers (any hints?) and then focus on the woodwork. May well use one of the solutions in this thread.