I did a bit of cosmetic fiddling with mine - new grip safety and trigger. Swapped out the thumb safety for a larger paddle, added Fusion adjustable rear sights. Minor stuff really. Like an early Detonics the Defender is the one of the most reliable 3" 1911s I own. I can't recall a single stoppage or failure to feed in the thing.What can you tell me about the Colt Defenders? We're there issues with reliability with these ? I see a lot on gunbroker and auction sites . We're these also made in 70 & 80 series?