Well, I just did the exact same thing with frame 34! I beveled the top step of the B parts and took just a smidge off the bottom of the A piece (< 1/16"). I then placed the two steps underneath the deck and slid the frame in place... with a loud snap, just as you noted.
Getting it out... I guess we'll find out how that goes pretty soon because I need to repeat the process with frames 34 and 35.
Getting it out... I guess we'll find out how that goes pretty soon because I need to repeat the process with frames 34 and 35.