Hi, new here, hoping to pick my new FL2 HSE up at the end of Oct.

I'm considering changing the audio system on the new FL2, and have been doing a little poking around. I've found double din brackets for the FL2 made by Kenwood and have a couple of questions:

1. Can this Kenwood bracket take other double din units from a different manufacturer, say Alpine or Pioneer?

2. Are double din units all the same size? (I know this sounds so noobish).

Got a few more questions after searching through this forum:

3. If I fit an aftermarket double din unit in, is there anyway to get the audio controls on the steering wheel to work?

4. Is the reverse parking sensor system thingy linked with the original audio system?