Experimental Dual Gear, Quick Release, Extruder

I'm building a 1.5M tall delta and wanted an extruder capable of pushing filament through a lengthy bowden tube but the existing ones seemed overly complicated to make or didn't have a quick release.

This uses a 5:1 planetary geared Nema 17 Stepper, along with:

5mm rod
5mm spacers
10mm bearings
2 x MK8 Extruder gears
2 x 13t Pinion gears sold for RC cars.
4 x barrel nuts (5mm)
2 x Long bolts (5mm)
2 x Extruder Springs
1 x 5mm to 8mm reducing colar

You need to drill the thread