HP-01 available

[Alejandro Paz(Germany)]

You seemed to be using a 1.0 mm thick PCB, weren't you ? I was wondering if a 0.6 mm board could be used to avoid on sanding the RTC. In case you are using 0.8 mm, then forget it, as it is not going to bring much, I think.
I don't have a HP-01, but still find your work very remarkable.