Replying to Fks pre-release

i just picked up a pair of fkx classics bindings mounted to some rossi pro carvers for 50 bucks, in mint condition. i was able to adjust the forward lean to my boots. indicator between the dots with boot steeped in but with the din cranked way down they still release wayy to easy. they are in fair to nice condition with some small basic wear and tear. does it sound like the springs are shot? how would i go about replacing them? id prefer to not take them to a shop and spend twice what i paid to have them just looked at.