Motorized Escalator Model - Redux

This is a reworked version of my motorized escalator model. Similar to the updated version of the non-motorized escalator, this model incorporates a bunch of improvements to greatly simplify assembly and increase the smoothness of the mechanism.For a version that doesn't require soldering and uses Maker Supply parts, check out this version: https://makerworld.com/en/models/589146#profileId-510496MaterialsHardware10 M3x14mm bolts (can substitute these for longer bolts, within reason)9 M3x10mm bolts (can also substitute these for longer bolts)WiresDouble sided tape (for electronics)ElectronicsN20 geared motor, 30RPM 6VDPDT 3-position On-Off-On toggle switchIf using an 18650 battery:TP4056 battery charging board or similar18650 battery and holderIf powering directly from USB:USB C or Micro USB breakout boardPrinted parts30 steps60 chain links2 end caps1 left outer track guide and 1 right outer track guide1 left inner track guide and 1 right inner track guide1 left handrail and 1 right