I would recommend pulling the rig to move the step. Mine was corroded in place and it took many tries to get it to move forward, and I think the likelihood of success with the mast butt swinging around your head is limited.
Your prebend must be pretty dramatic with the combo of partners forward, step aft. Make sure when you correct the problem to extend your headstay to the class maximum (35'-10 1/2"). You will be amazed at the difference in point and power with proper rig positioning.
Grand Cayman...just heard a forecast for snow tonight. Do you need help tuning that rig?