Interesting question! I believe the answer is no. However, I had the same question over the possibility of the mast jumping off the step if I rocked it pretty far forward. (The mast butt is fastened to the step by two small screws, one on either side.) I discussed the issue with Buzz Ballenger, and he made me a plastic butt plug about 1/2 or 3/4 inch thick which I bolted to the hinged mast step plate. This plug extends upward into the mast to assure that the mast will never jump off the step as a result of it being rocked forward and backward. This was probably overkill, because I have never heard of an E27 mast jumping off the step.