3-4-19 There is now a single piece version for 330mm/13"+ print beds: https://www.thingiverse.com/thing:3468826
3-4-19 Glue up version prototype:https://www.thingiverse.com/thing:3470025
Original:
This is a riser for the common Rosewill/Best/Flexzion/Yobo food dehydrators.  It holds 2 1KG spools.  With this mod, you don't need to destroy your food trays to fit a spool.   This dehydrator sells for about one third the price of the exact same filament dryer unit.   They are two versions; a three and a four-part unit.  The three-part panel is quite large.   I've also included a 4 part STL including two of the 4 needed panels.   It will print on a typical 8.4" bed.  Ive included .5mm clearence on the pin shaft.   If thats not enough you can scale the pins just in the x-y directions or drill out the holes a little.  The pins are optional, you can substitute bolts or even zip ties.
Here is a link to the machines:
Rosewill Dehydrator https://www.amazon.com/gp/product/B018UR4XJI/ref=as_li_ss_tl?pf_rd_m=ATVPDKIKX0DER&…

As previously mentioned in my Filament Dryer box (www.thingiverse.com/thing:4608440), this is basically the same but with an additional heating unit.
Modifications to the original:
Height has being increased by about 40mm, to accommodate the heating unit.
Joins between the casing has been increased by 1mm for better assembly and sealing.
Improved EndCap. Tested with a few bowden tubes for better fitting.
The Top cover bowden tube connector has been mod to 11mm dia to better fit the quick-fit connector.
Heater unit is separately printed, this is to help ease of assembly but need to anchored down using UHU glue.
I have also included a STEP file (complete) for those who wants to modify the design.
The casing was printed with PLA, the heating unit with PETG.
The parts required:

12Vdc 4020 Fan, This fan is to circulate the heated air within the casing. It must always be on when the heater is used. I wired this fan directly to the 12VDC input.


75x75x1mm copper plate used as heating plate. You can use other sizes…