Tuning Avenger. Need info on convertion to bottle gun. Also, how fast are you shooting

[Guest]

Hi. I'm hoping one or more of you Avenger owners can tell me how to replace the air tubes with a bottle. What is the thread size of the tube? Who might have or make an adapter? Also, can I get 34gr pellets to 900+fps with a factory gun? Thanks in advance for your help. Feel free to call me with any information you may have. 

Bill 503-504-7084