So I have been skiing with this vest for like 3 -4 years now and it has allowed me to get back into skiing because of Low back problems , don't have any problems with that anymore , but in last 1 1/2 i have been dealing with alot of upper back and neck soreness. I thought it was how I was pulling ( maybe harder) but decided to take apart vest last week and the plastic is cracked on both sides. Called Goode and they are making new one for me. The questions i have is for those that use the vest do they have same soreness ? , has your vest cracked? have you heat molded it ? I'm thinking the heat molding would help. I was thinking that would heat mold around normal t-spine curve in back ? How have you guys done this ? Thanks for insight.