Well, we went off-plans (a rare thing for us) and added a parking brake. We used a Matco valve and a friend showed how he mounted his. Took a couple of extra work days to get everything right, but things are working out OK.
One thing I REALLY LOVE about Van’s aircraft is that they work hard to get a safe, secure, easy to complete plane in the air while controlling costs. I get to make some decisions along the way if I was to add a little more. For example the brake lines in the cockpit. They are fully functional, and very low cost. BUT having worked on this before, I realized I wanted to spend a few extra bucks on different lines and hoses. My choice. And adding the parking brake? My choice. If you did a heads down, by the book build, you would have a safe plane that did wonderful things. Add a few touches and you will have a plane you built and will be proud of.