By all means, call Crimson Trace. I highly recommend their customer service (phone number is in the folder that came with the grips). To illustrate from personal experience, some months after the warranty (two years) expired on the CT grips I have on my Browning Hi Power (have two others on revolvers), it began to eat up batteries after three or four range sessions. I called CT customer service. First I told them the warranty had expired, then I told them what my problem was. They waved aside the fact that the warranty was gone, sent me a new set of grips and asked me to send them mine for analysis -- all on their nickel.
Cordially, Jack