Hi there,   I used to work with the CraftBot a lot, it's a great printer and it prints in sweet quality! I printed loads of exotic filaments with it e.g. ColorFabb XTCF, XT-20, Flexible filaments etc.   Lately there occurred some issues regarding printing, I tried several things in Craftware. Changing the temperature, foundation extruder adjustment, etc.  
Following stellar results in 3D printing with flexible filament - think 3D printed soles or flexy arms -, we decided to put Gyrobot's skills to test with the #flexmarvinchallenge. And guess what? He didn't disappoint!    Here's how he did it:     Printer: BQ Witbox retrofitted with a Recreus Extruder Filament: Green Filaflex from Recreus. The world's most elastic filament for FDM machines.