ETD "....You can fit a 10.8v 1500mah nimh battery in there from cheapbatterypacks packs.com (contact me for more info if you want the design specs)."
I see you got a battery to fit. Wan't that fun.
Why don't you post up the info in this thread. It would help folks out.
** On another note...
I don't own a SIG 552 right now, I sold my last SIG552 when I heard G&G was releasing one.
It was a Franken SIG552 of JG/TM/Hurricane. I already had my G&G SIG550 at that time.
I am purchasing a G&G SIG552 as soon as it is available, based on my experience with the quality of my present G&G SIG 550.