[MrForbes]

I'm saying that you should be able to click on the link, find the zip file with the arena drawings, and then look them over so you can see which one describes the bump, and use that drawing to make your own bump.

It's not that hard to do, and you'll get it right, and learn stuff in the process.

I would measure the one we made, but it's 15 miles away and locked in a secure compound right now.