Similar experience. My order took 3 months and 1 week from order being placed to receiving it and the delay I was told (in addition to Lunar new year) was due to the unusual size of the bars. Also experienced that the tracking number I was given didn't seem to be updating for a number of days after it was created to the point where I also asked if the the package had actually been shipped.

Working on the build now and it's going relatively smoothly. Managed to figure out the internal cabling without too much issue. Only trouble I ran into last night related to the frame was that the bolts on the fork where the caliper screws into seemed to have some hardened residue on the inside which made mounting the bolts a bit hard. To the point where I was questioning whether they choose a different size other than the standard whatever that is but eventually with a bit of force they went in.

When I was reading that the back brake mounts could take a 160 rotor I thought this meant without the adapter, as in the caliper mounted directly to the frame as I've seen this before but maybe only for 140? Had to mount it with the adapter like my previous frame.