GCI Murdock Plus is a similar circuit to Murdock but with the addition of hard clipping diodes, gain, and volume controls. It's a simple, somewhat transparent overdrive circuit with a maxed out HM-2 style EQ circuit as a parallel blend.
The pcb has the dimensions 58x48mm. It comes along with the original 3PDT utility pcb.
Here you can find a ready to solder kit:Murdock Plus kit
Here´s the build documentation:
Murdock Plus docs