Accessory for Flying

I've been designing in Blender an indexed flight stand for use with my 1/144 aeroplane models. The wheel is numbered from 1—10 to indicate altitude (Canvas Eagles maxes out at 10 levels of altitude) and the cap has a big arrow embossed on its top to indicate heading.It is socketed to accept a 3mm acrylic rod, which has a magnet glued to its top for the aeroplane models to stick to. The models sometimes turn on the magnets, making the actual direction of flight ambiguous, hence the arrow to remove all doubt.I have printed the prototype, and it works fine, so with a couple of minor tweaks it's ready for mass production.