Just completed construction of this little wonder! Perfect PCB from Jürgen and very clear instructions. Alongside is a short video of the little LGP-30 in action. I still need to add the key tops and I am still thinking about how I will house it.
The monitor display is something that the original builders of the LGP-30 could only dream off: It shows the drum contents and the major registers! I can also reduce the drum rotation speed down to just a few RPM when the display animates and shows the tracks moving under the read/write heads!