I sent my Stratos Helix expert in for service and ordered a 600lb. progressive coil spring for it. It originally had a 500 x 2.2, 5" free length spring. I get it back w/ a 600 x 2, 4.6" free length. Shoudn't the springs stroke exceed the shocks (2" stroke)? I called to get a longer spring and was told they will not be availiable??? kind of sounded like Stratos was going under. Where can I get a prog. spring? Thanx