I currently run a '95 mx5 turbo with a 2003vvt engine.
it's on Speeduino at the mo and runs well...but I wanted to try rusefi so I'm starting off planning to use it as a VVT controller.

here is my bench test.
- cheap "DIY more" stm 32f407
- Arduino mega running Ardustim (pattern generator for various decoders)
- an opto board for level shifting.
I added a pattern in ardustim 5degress advanced and tested switching between the 2. looks good