I have a BSA Lightning XL which is 2 years old. Was wondering if it was time to upgrade the spring thats in at the mo with a Theoben Gas Strut Conversion or with a V-Mach tuning kit. I will be using the gun for shooting rabbits mainly. Not actually used it for anything but targets at the mo. Just recently bought the gun second hand. I also have a Hawke 3-9x40 scope on at the mo and was also wondering whether i should put maybe a 3-9x50 scope on it, but will this actually gain me much? i am finding that when i zoom in on targets at about 30 yards although you can see the target the image is not