K8400 VERTEX Spool Holders for M.G.Chemicals and Shaxon

Yet another 2 spool holders for K8400. The big one can hold both - M.G.Chemicals and Shaxon 1kg (2.2lb) filament spools. The small was designed for M.G.Chemicals 0.25kg (0.55lb) spools.
For the big holder use four M3x25mm screws and M3 nuts.
For the small holder use four M3x12mm screws and M3 nuts.