Here's a link to a post I started over on the GTA. It's the process and results that I and some others encountered while doing the same mods to their guns. It's now pretty lengthy thread but there is a lot of good information if you have one of these fantastic guns but are not happy with the shot count and loopy shot string.
JK
http://www.gatewaytoairguns.org/GTA/index.php?topic=94723.0
JK
http://www.gatewaytoairguns.org/GTA/index.php?topic=94723.0