PCB-Knowledge.md

@@ -10,16 +10,20 @@ Knowledge gleaned from failure.
 ## Vendors
 
 When ordering PCBs, review the [stack layout](https://docs.oshpark.com/services/four-layer/), tolerances, and the substrate material (FR-4 or [Rogers](https://morepcb.com/rogers-pcb-material/)) for the vendor.
+| Vendor |  Pros  |  Cons  | Resources |
+| ------ | ------ | ------ |  -------  |
+|[Oshpark](https://oshpark.com/)|Trusted, quick, purple, USA|Substrate spikes on the edges|[4-Layer Coplanar Waveguide](https://hackaday.io/project/162998-the-rise-and-fall-of-pulses/log/168604-osh-park-4-layer-coplanar-waveguide)|
+|[Circuit Graphics](https://www.circuitboard.com/)|Quick, USA (SLC), Cheap, Lets us use our material|Difficult with *hard* substrates (Rogers)||
 
-- [Oshpark](https://oshpark.com/)
-  - Pros: Trusted, quick, purple, USA, [Design Resources](https://hackaday.io/project/162998-the-rise-and-fall-of-pulses/log/168604-osh-park-4-layer-coplanar-waveguide)
-  - Cons: substrate spikes on the edges
 - [Circuit Graphics](https://www.circuitboard.com/)
   - Pros: Quick, USA (SLC), Cheap, Lets us use our material
-  - Cons: Difficult with *hard* substrates like Rogers
+  - Cons: Difficult with *hard* substrates (Rogers)
+- [Aisler](https://aisler.net/)
+  - Pros: 
 - [PCBWay](https://www.pcbway.com/)
-  - Pros: Reasonable job with Rogers materials
+  - Pros: Reasonable job with Rogers
   - Cons: China
+  - 
 - Other Chinese vendors [Fast-PCB](https://www.fast-pcb.com/), [JLCPCB](https://jlcpcb.com/)
 - Needs Review: [Advanced Circuits (4pcb)](https://www.4pcb.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/)
 - DO NOT BUY: Aisler, nextPCB