I have an older (1972) H-16 in excellent condition and I want to upgrade the rigging to a 4 line trapeze. The current mast tang is just a strap about 3/4" wide with one hole for the shackle. All of the parts guides and manuals show a larger tang with three holes - one for shroud/stay shackle and 2 for the trapeze shackle. Should I change the tang given that there will now be about 380 lbs hanging off the trap wires? The mast tang is not cracked, but it is bent down at the bottom most point and pushing into the mast a bit.