Stack-able Horizontal Spool Holder

Having enclose my printer, I needed a spool holder. I saw the various holders on Thingiverse but because I have a lot of room in my enclosure nothing suited my needs. I wanted something that could keep all my filament that was opened dry and at the same time convenient to use (the enclosure reaches a temperature ~100 deg F). Thus the stack-able filament holder.

Need different sized Coupler and Spool Base? Measure inside diameter of spool hole -1 mm and leave comment and I will create STL for you.

Update
New photos showing successful use of stacked reels.