Building for ARM should work, which particular variety? If you have Golang 1.6+ installed, you can checkout the cardigann repo and run:
GOARCH=arm GOOS=linux go build -o cardigann *.go
I’ll look at adding the popular ARM versions to the releases Can track progress here https://github.com/cardigann/cardigann/issues/16
In terms of using Jackett trackers, no I’ve gone a very different way to how they represent trackers. They aren’t templates, they are code.