Based on the recent print tests I realized I am much too close to the physical limits of the current printer prototype to get the best print quality I can. Therefore, I decided to focus my efforts on the development of the updated version which addresses these limits. From my perspective it is more time effective than to upgrade first prototype.

I have already finished the design of the bottom printer's part. The top printer’s part is finished from say 80%, so I think I will start building it in about a month. If it works well, I plan to gradually release this version as an open source.