DIY Bondtech Extruder

https://www.reddit.com/r/tevotarantula/comments/8kag2m/resource_real_bondtech_extruder_for_16_almost_90/

1. Does Bondtech work with 3mm filament? Yes, with a geared down stepper in the form of the Universal Extruder - [1]. They also have one for 1.75 mm filament.

Review

OSE Summary: for industrial printing with Supervolcano Heater Block or larger heaters where filament force starts to matter - yes, dual drive is useful. E3D people confirmed that the limit of going larger than Supervolcano is whether you have enough force on the filament.