I'm still concerned about the single launch shaft.
During ascent if the wind buffeting is heavy enough it could cause the wings to smash into the teflon-coated girders and cause some significant damage.
Any thought of extending the teflon strips down until they are just standing off the wing surface? That should minimize the chance of wing damage due to buffeting. You wouldn't want them constantly touching the wing due to the chance of freezing, but a small ( 0.5") gap should give the chance for the wings to move still, freeing them up from any potential stickiness, but reducing the overall roll movement so as to prevent damage.