umm. . .how good are the smartparts repair centers b/c i kinda messed up my sp-1

There is a leak at where the support handle (one without the trigger) attaches to the marker. The support handle is not fully screwed in and is jammed (the threading might be worn/bust) and i believe thats what is causing the leak.
I was curious and wanted to know all the functions of the sp-1 and how the gun works so i decided to get to know how to attach a flashlight. I turned the support handle 90 degrees but then was curious so i rotated it out to examine how the gas passes through the handle and into the gun. I then tried putting it back in but the wire/tube thing that transfers the gas was pushing against the support handle so that it couldn't really screw in straght. I tried, but it got jammed before it could fully screw in and when i connected the co2 tank the next day, there was a leak at the top of the handle. So, thinking it's because it was not completly screwed in, i took a wrench, clamped it around the handle and forced it to screw in (i know, a stupid action

). so it screwed in just about completly but there was still a leak at the top of the handle where it connects to the marker when i connected the co2 tank. Now it is jammed, it requires a wrench to just rotate it and i don't think it is coming out or it is just slightly coming out even though i am unscrewing it the right direction with the wrench.
if anyone has a home solution then that would be helpful, if not i'll just probably send it in to the repair center and hopefully it won't cost too much.
heres a image of my marker:
