[Build-It-Break-it]

Hey Sonar Chief, I had the same little dilemma. After searching I saw how chassis works attaches there subframe to there subframe connectors.

They have a piece of square tubing in each side of the subframe that slides into the subframe connector then has bolts that go through to attach everything. This makes it removable. Just make sure you put crush sleeves so when you bolt everything up they don't crush in on each other.

I like there design the best, everything is removable and secure. Hope this helps. Just look on there website.