An front catch plate for manual, pneumatic or battery powe-operated dual-barrel dispensing guns of the type having a pair of laterally-displaced and adjustable plunger shafts with end-mounted pistons for extruding compound from both cartridges of a variety of sizes of twin cartridge packs. In some examples, one or more controller modules may maintain a data structure including a plurality of server update domains, each server update domain including a set of machines of a plurality of machines of a distributed computing system which may be concurrently updated. The conformal coating protects the die during assembly, and serves to electrically insulate the die from electrically conductive parts that the die may contact. In the case of an interactive print job that requires mutual communication between the client and the printer, only the print queue is stored in the buffer, while a wait signal is output to the client to wait for transmission of the print data of the print job. The programmable matching circuit may be integrated on the chip or external to the chip. The encoder may further include an encoder interleaver memory.