This may come in handy:
There’s a slightly misleading bit in the manual ^ when you place the mid cabinet [ with bass/mid driver ] upon the base cabinet, don’t push too hard, the spikes should not piece though the aluminium pads, only need to dent them slightly after carefully lining up the cabinet. This is so the mid cabinet stays aligned up correctly. Hopefully yours will already be correct in this matter.
Also, not mentioned in the manual: on wood grain veneer finishes the wood grains line up on all three cabinets of each speaker, so the individual cabinets will be purposely made for three for one speaker, and three for the other, although i’m not sure if this applies to black ash finish. (?)
Consider dusting, the rear sides and metalworks, and bee waxing & polishing the cabinet sides before starting assembly, this may take some time if done proper but it will be easier doing this before set up.
Allow plenty of time with setting up, it’s not a race : )