PCB-Knowledge.md

@@ -21,7 +21,7 @@ When ordering PCBs, review the stack layout, tolerances, and substrate material
 |[JLCPCB](https://jlcpcb.com/)||China||
 |[Advanced Circuits (4pcb)](https://www.4pcb.com/)|USA|||
 
-- Needs Review: [PCBgogo](https://www.pcbgogo.com/), [Sunstone](https://www.sunstone.com/), [Avanti Circuits](https://www.avanticircuits.com/), [PCBcart](https://www.pcbcart.com/), [ACE PCB](https://ace-pcb.com/)
+- Needs Review: [Custom Circuit Boards](https://www.customcircuitboards.com/), [PCBgogo](https://www.pcbgogo.com/), [Sunstone](https://www.sunstone.com/), [Avanti Circuits](https://www.avanticircuits.com/), [PCBcart](https://www.pcbcart.com/), [ACE PCB](https://ace-pcb.com/), [Precision Technologies](https://www.eprotos.com/), [JetPCB](http://us.jetpcb.com/), [EuroCircuits](https://www.eurocircuits.com/)
 - DO NOT BUY: nextPCB
 - [PCBShopper](https://pcbshopper.com/) to compare prices