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TECH BULLETIN: CS3 HPR Body O-Rings ⚙️
Whenever we hear reports of any issues with our products – no matter how small – we like to jump on it as soon as possible, try our best to understand the root of the problem and then provide a definitive solution. Over the last couple of weeks we have received reports of some inconsistent air leaks from the frame and POPS area of the CS3. Every marker that we produce is thoroughly tested prior to packaging and shipping, but unfortunately these leaks have developed after shipping, and normally at temperatures below those that the markers experience in testing. This is generally down to contraction – or shrinkage – of seals that occurs as the temperature drops. The leak can be heard from around the grips or, with the grips removed, from the Regulator Hole A in the side of the frame. It can also be heard from the join between the bottom of the frame and the POPS. We have traced these leaks to what appears to be a bath of bottom tolerance 016 NBR70 o-rings used on the brass HPR Body (see
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