1/2" to 1" filament spool support

If, like many, you're building a filament spool support from 1/2" PVC tubing, this might be useful: glue its 1/2" end to the top of the vertical elements and then snap in the horizontal support to the 1" end with your spools loaded (a "click" will hold it into place; in this case I used a 1/2" PVC tube with 1/2" to 1" couplings on both endings).
I know it's kinda ugly and it could use less material, so please fell free to remix it!