Update:
So the manu got back to us with a defect, pics first.
An explanation:
These burns were spotted while anodizing, and according to the manufacturer it is a consequence of a slightly thinner bottom part than expected. All these marks will not be visible once the brass weight is dropped in, and all other parts are in tip top condition.
We're sorry about this defect but given the small amount of units and the complexity of reworking (which may cause more problems to other parts) we've decided to proceed, once again I would like to reiterate that these are not visible once you've assembled, and all other surfaces are pretty much good to go.
We're also looking to receive the PCBs within the next 2 weeks, no ETA on the kits yet. I will post more updates once I receive them.