filament rack exenders

I came across this shoe rack on Amazon that looked like a great solution for storing my spools of filament. The only issue was that the vertical spacing was a bit tight, which made it tricky to put spools on and take them off without tilting them sideways or just forcing them in and out. So, I thought I’d look for a way to improve that, and this is what I came up with! It fits a 13mm rod; it’s a slightly loose fit, but that was by design for me. To complete the whole rack, I would need to print 36 of these. No supports are needed. I didn't need a brim on my P1P but I would suggest using it for printers with horizontal moving beds (bed slingers).Here's the url to the rack I got from amazon - https://www.amazon.com/dp/B09Q678QVP?psc=1&ref=ppx_yo2ov_dt_b_product_details