We have switched over to the CSV17 launcher for just about all our field use. It is smaller and lighter and it reaches to 160 feet or more. This seems to be more than enough for most purposes. The 3″ joints are a bit easier to cement than the 4″ joints, and the CSV17 fits into a much smaller container for storage and transportation. It is also lighter and uses less energy per launch, and allows the option of using 12 gram CO2 cylinders and a bicycle tire adapter for launch power.