The G 200 was introduced as a downsized M 5. It is identical except for the missing adjustment knob for the breathing effort. This second stage was later (even parallel) sold as G 200 B. Thats the downsized G 250 (balanced). Naturally there was a Upgrade-Kit from G 200 to G 200 B. It isn´t sold any more, but the parts are still availlable except for the sticker.
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