diff --git a/misc/wireguide/README.md b/misc/wireguide/README.md
index af09a69..b81e461 100644
--- a/misc/wireguide/README.md
+++ b/misc/wireguide/README.md
@@ -1,3 +1,23 @@
 # Wireguide
 
-This is a parametric model of a tool to put the individual wires of an ethernet-cable in the correct position to easily attach an IDC-connector (vampire tap)
+The original plan of connecting the CAN-modules was to use an ethernet cable:
+we would strip the outer layer of the cable where we want to connect a module,
+then put on an IDC connector. We would then use one twisted pair for CAN data, and
+the other pairs for 12v. We wanted to use an ethernetcable because we have a lot of
+spare ethernetcable that's too good to throw away, but too long to be practical.
+The CAN specifications also demand a twisted cable.
+
+So in theory, this was a great solution. Unfortunately, theory and practice are
+the same in theory, but not in pracice: connecting the IDC connectors proved to be
+very time-intensive (first stripping the outer cable, then partially untwisting the strands
+and putting them in the correct order) and error-prone (the slightest issue in alignment
+	will cause two strands to become electrically connected).
+
+To partially fix this, we designed a small tool that would be able to more easily keep
+the strands lined up before pressing the IDC-connector together. This also proved
+to be rather hard, so we gave up and just ordered some automotive twisted wire that is
+made for CAN traffic.
+
+The term you'll need when trying to buy this twisted wire is `canbus wire`.
+
+`wireguide.scad` is a parametric model of a tool to put the individual wires of an ethernet-cable in the correct position to easily attach an IDC-connector (vampire tap)