Three-Spool Dry Box

Three-spool drybox and power supply module I designed because I wanted to be able to dry multiple rolls at a time, and my kitchen oven is gas-heated and won't actually dry filament.

The box can easily reach and hold 60C to dry PETG filament if it uses the big distributor (and 120mm fan). The two-5015 fan small-distributor doesn't blow enough air and the box tops out at around 45C. The heater I chose has a built-in thermostat which shuts it off if the heater temperature gets too high, and with the small distributor the heater thermostat starts clicking off when the box gets to around 45C.

I have not insulated the box at all. So far it works fine up to 60 C, and can probably go higher, but the surface of the box gets quite warm. It would work much better if insulated, and I can see wrapping something around the box to do this. The polypropylene of the box should not have any issues up to almost 100C, although many of the parts inside will have trouble getting so hot.

I shou