[Kevin Sevcik]

We're thinking about trying this as a self-drawbridge/sally port crossing. I think better than tapping is having your extension out to catch the drawbridge. Drive off it, drawbridge swings up, catch with the extension and push it down to drive back. It's probably a little slower, but it's a lot more obvious you're not touching the drawbridge if it's free-swinging upwards.

But yes, you'll definitely need to warn the refs for the first few matches. Though if this is legal, I think it'll be common enough that they'll just watch for it rountinely.