@nxt-1 I would not buy safety devices like thermal fuses via ali-express. TCOs made by well known manufacturers, with multiple safety certifications, are only about $1 each. This is no place to get cheap. If you're in the US, Digi-key and Mouser sell TCOs made by reputable makers, with multiple safety certs.

Don't use tape to hold the TCO to the bed/heater. If the tape fails the TCO won't do its job. Screw or clamp it down mechanically or glue it down with high temperature silicone, like the stuff used to make gaskets for engines, available at any auto parts store.

TCOs have to be chosen for adequate current and operating temperature, typically 20C or so above the expected maximum use bed temperature. Consult data sheet for exact selection criteria.