Bergfried Dice Tower (modular & dual color)

Please try to calibrate flow rate first to achieve dimensional accuracy. I recommend to print outer parts with inner brim for bed adhesion. I printed it with 0.6mm nozzle and 0.3mm layer height. 

Parts (version 3.0) were modified to print in dual color on single extruder machine. Gap between inner and outer part was added, but you need to test it on your machine.