dalek 150 percent

WIP! Dalek printed at 150 percent to accommodate placing of stepper motors (byj, 2x for movement, 1 for the dome), RGB leds, blue led, ultrasonic sensor, dfplayer module, easy driver stepper drivers, arduino uno with integrated sensor shield. Programneck= to attach a usb cable to the uno without totally removing the upper parts (for testing). All powered by a 3s lipo. First idea was to move the head around by a servo, but servo's show nasty behaviour, so it was cut out and replaced by a byj stepper.
Also attached a first concept arduino program for it.

Update 061021: replaced core, stepper mount added.
Update 061421: new concept program added, another library used for the dfplayer.
From now on only the software will change.
Update 061921: previous sentence was incorrect......redesigned the bumper to fit in a pair of chinese geared motors. The (yellow) plastic geared motors revved much to fast, so now incorporated much slower ones (30 revs per minute)
Programming the Dalek is