Universial wooden dowel spool holder

I quickly cobbled this together in Tinkercad. For basic usage (one "average" spool) it requires four 14cm segments of 1/2 inch square wood dowel. Such segments are usually discarded when cut from the larger retail/store-bought pieces.
It's Universial:
The setup can be extended to accommodate multiple spools if a longer horizontal dowel is mounted between two assembled "stands".
Alternatively, any size spool can be fitted so long as the wood dowels are cut to appropriate sizes.
It's Scalable:
As a bonus, the entire design is scalable to suit almost any size of square dowel/tubing. Currently the holes are set to exactly 13mm, scaling to 77% will give you joints suitable for 10mm dowel. Scaling to 147% will give you joints suitable for 3/4inch square tubing/dowel.
It's Simple:
Enough said.

Edit: Changed "13cm" to "14cm" to accommodate an even wider range of spools.

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