Can the CPS 4100 be filled using a quick-fill device?
Yes and no. The CPS 4100, in unaltered form, is a repainted Monster (2001) without a quick-fill port. However, forum member Timmitop discovered that the 8.5X nozzle can be used as a quick-fill device input. The pull valve in this case acts as a check valve and the gun can be filled through the 8.5X nozzle.