New BIBO Dual Extruder Drive Block Upgrade

I have had a lot of problems with under extrusion and just an overall bad experience with the extruder mechanism with this iprinter. I followed other things lead and created a spring loaded Extruder Drive Block Upgrade which has been working great.

Each side requires one of the following:
8mm m3 Flat Head Countersunk Bolt
16mm m3 Flat Head Countersunk Bolt
20mm m3 Flat Head Countersunk Bolt
0.36" OD, 0.042" Wire Size, 0.69" Free Length 28.32 lbs/in compression Spring

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