Spec compatibility matrix, how do you make “Bambu X1” or “Prusa MK4S” or “Creality K1” filter to compatible nozzles, hotends, build plates?

Custom EAV attribute set + Magento layered navigation + indexable filter URLs.

Attribute model: every nozzle, hotend, build plate, fan shroud, extruder mod, hot-end heater gets a multi-select EAV attribute called compatible_printers. Values: bambu_a1, bambu_a1_mini, bambu_p1p, bambu_p1s, bambu_x1_carbon, prusa_mk3s, prusa_mk4, prusa_mk4s, prusa_core_one, creality_ender3v3, creality_k1, creality_k1_max, creality_k1_se, voron_24, voron_trident, etc.

Front-end UX:

• Pinned “Select your printer” dropdown in the layered nav, persists in customer cookie + customer-attribute for logged-in users.
• Once printer is picked, every category page (Nozzles, Hotends, Plates) filters automatically to compatible-only SKUs.
• PDP shows a green checkmark with the customer’s printer model: “✓ Confirmed compatible with your Bambu X1 Carbon.”
• Incompatible items don’t hide entirely, they show with a greyed-out warning, link to a “Find the right one for your X1” helper.

SEO bonus: each printer-filtered category URL (e.g. /nozzles?printer=bambu-x1-carbon) is indexable via the Panth_FilterSeo module, rewrites to /nozzles-for-bambu-x1-carbon.html. Ranks for “nozzles for Bambu X1 Carbon” long-tail searches at zero extra content cost. I’ve seen these filtered URLs out-rank the manufacturer’s own parts page within 8 weeks.