Just bought myself a 3-yr old used FTR from Airguns of Arizona here in the states and I need some help if you can. It arrived w/o an instruction manual so I printed that off the Daystate website. It also came with an aftermarket, generic 12 volt charger. Unfortunately, nothing seems to indicate if the center pin for charging is positive or negative! I'd really hate to guess wrong and mess up the electronics! Does anyone know the proper polarity setting? Also, I didn't get an allen key for the bolt connecting the stock to the action and the recepticle is bigger than any key I have. Happen to know the key size for that bolt? I'll ask Daystate if I must but they seem slow to respond. Many thanks!