SPANNERHANDS small volume remix

Update 2019.8.6
- added windowed versions of the full lids (thin and 1kg). Get the base models from original Spannerhands thing

Update 2019.1.28
- update base and lid models: ears are better optimized for printing
- BASE2: change form, requires less material
- added universal 1kg and 750g core, uses 608 bearings
- added lip model, to be used inside the container. I've had some problems with some spools unraveling inside the box, this should help with it
- more rigid bolt

Update 2018.