This video describes the current state of my upgrades which seem to be working very well. I don't have any more planned.
Z home switch mount: https://www.thingiverse.com/thing:177...
Y axis rework: https://www.thingiverse.com/thing:204...
X axis tensioner: https://www.thingiverse.com/thing:213...
Spool holders: https://www.thingiverse.com/thing:127181
Electronics case: http://designz.co.uk/product/aneta8...
Filament guide: https://www.thingiverse.com/thing:176...
Power supply cover: https://www.thingiverse.com/thing:233...