what type of spring is best to use for this? i would like to make on for my volcano once my parts come in. has anyone put one on a volcano sv? where did you get the spring for yours? where did you mount it?i'm just trying to get idea because i got my volcano in pieces and i would like to get all the ideas i can for when i get her up and running again.i will also have some real interesting pics for you guys i'm hoping late next week.