I had to go to work and couldn't follow up with any of this until now . It looks like I'll probably go with the .177 cal. I've never tuned anything, so I plan to shoot a little bit first and then do a simple tune just to get my feet wet so to speak. I'd like to pimp it out to look a little bit like Gene's too. Is a gas spring the same as gas piston ? The thought that I could someday change it a gas piston is very interesting. Over my head right now, but I would like that for sure. How is the trigger in the 57's do I need to do anything there ? I'm thinking Leapers 3-9 compact too for a littile more than the gun cost...lol