AlexChurchill/Puzzle4

I found this much easier to solve, but for some reason feels very satisfying - there's something nice about all the templates being identical and yet it still being nontrivial. - MoonShadow

I'm glad. It occurred to me that there could be scope for some fun like this. There's potential for an alternative: each template requires blocks of four different colours, but they're also all different shapes: /Puzzle5... --AC

 .23.
 .23.
 .03.
 .02.
 1311
 1230
 2101
 3020

 01
 23

 01
 23

 01
 23

 01
 23

 01
 23

 01
 23