If you want to make it really easy to pump at the 2-3 pump level, absolutely do the two-piece valve spring mod.And then move the forearm back like I did here:https://www.gatewaytoairguns.org/GTA/index.php?topic=129389.0[/quote. Thanks, I will look up twin spring mod. I had never heard of that. I don't want to increase volume just spring psi to pump easier