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Jun 2018
10 months later

I still have the 7.4 firmware that came on the machine and haven’t touched it. I found this series of videos:

and have followed what he recommended buying the nozzle that he recommended and adding the active cooling mod and adding the glass bed and using the filament that he recommended:

Cooling mod:

https://www.ebay.co.uk/itm/Active-Cooling-Fan-Kit-for-Replicator-Wanhao-FlashForge-CTC-Dual-Extruder/322381439384?hash=item4b0f6e6198:m:maHMk0j-O5L55EIS6RvYDSg 10 .
Best fans although a bit noisey:
https://www.amazon.co.uk/dp/B01CZFUOD0/ref=pe_3187911_185740111_TE_item 1

Which I actually bought as part of this whole upgrade package from Gearboy on Ebay:
https://www.ebay.co.uk/itm/CTC-Dual-Extruder-3D-Printer-Flagship-Upgrade-Kit/322468568468?hash=item4b149fdd94:m:mU9dnkKvVbLd9WhV2ZOEXEg 14
All these mods help the printing. It is possible to make this cheap machine print as well as a more expensive machine doing all this and doing + lots of testing at each stage.

The Rigid Ink PLA filament recommended in the videos was this which worked well:

Nozzle: http://www.ebay.co.uk/itm/32236704004… 10

Kapton Tape: http://www.ebay.co.uk/itm/11178056659… 3

Glass Bed: http://www.ebay.co.uk/itm/3D-Printer-… 9

These extruders work better than the plastic ones and help the filament keep being fed in. Can put spacers in where the springs go to make them give more pressure too:
https://www.ebay.co.uk/itm/MK8-Dual-Head-Extruder-CTC-Upgrade-Extruder-Full-Kit-3D-Printer-Part/322470379426?hash=item4b14bb7fa2:g:Z6wAAOSwKoRZYTMX 11

Hope that helps.