I know I sound like a broken record, but we are still working on building the final production samples.
Right now the hold up has been the main playfield artwork. We've scanned the playfield art ourselves twice already, but haven't been happy with the results since it's scanned in 16 separate passes and has to be reassembled from those 16 scans.
As part of our agreement with Planetary Pinball, Rick was recently able to offer some help as they worked on the artwork several years ago. That art has gotten us somewhat over the hump, but we are still verifying and reverifying the art registration vs the CAD, as there was some skewing (albeit much less) from their process also.
We have a large part of the parts for the final samples in house already, so assembly will accelerate shortly.