Adjustment units feel locked, lobs on 5 look good and I’ve broken the intake cam bolt and turned the cam to align it with the special tool. Locked the cam bolt back down and rotated the engine two full revolutions and rechecked the timing - all appears to be spot on now.

Plates sit nice and flat on the head and take no effort to apply or remove [emoji106]

Going to pull everything off the engine now and start reassembly, fingers crossed once she’s all buttoned up she runs this time!