Low profile tiny castor for mobile table serving platter

This is a tiny low profile castor designed to be screwed onto the bottom of a wooden serving platter so that it can be easily pushed across a flat table. 3 or more will be required per platter. The castor is only 12mm high! Needless to say it's not designed to take much more weight than the platter and a load of cheesey comestibles.

Extra parts required include suitable wood screws, some bits of 2mm diameter wire or nails to use as wheel axles, and optionally some heat shrink tube to use as "tyres" (or "tires" for those who spell in American) for better performance and some flat plastic to act as a smoother bearing surface on the bottom of the platter.

Parts:
*Vertical pivot screws: Wood screw, countersunk, max 3.5mm diameter, nominal 19mm length to suit platter
*2mm diameter nails or wire, cut to 11-12mm long as axles.
*Optional but recommended - 10mm diameter heatshrink tube to act as tyre and cyanacrilate superglue to secure it on the wheel.

Smooth castoring action d