The "Spyder Type" marker is any paintball marker that consists of two stacked tubes to make up the body of the gun, and uses gas released during the firing cycle to re-cock the gun. This style of marker is by far the most popular beginner level marker. Many different companies produce their own version of this type of marker. The generally known as a "blowback" marker. It's important to know that all of these markers work exactly the same. While they may look a little different on the outside, the internal parts of all of these markers are virtually identical. While this style of marker is one of the most popular markers in the world, it is also the one that gives users the most problems out on the field. Blowback markers require that you clean and service their internals almost every time you play. The most common problems that blowback owners experience is that the marker leaks, and or won't re-cock. These problems are directly related to a lack of maintenance. This Instructional DVD will teach you how to avoid these common problems, and how to fine tune the performance of your marker. It teaches you all about the differences in aftermarket barrels, how to adjust your trigger, how to find leaks, as well as goes in depth on various trouble shooting issues and upgrades. This DVD is perfect of any player looking to get the most performance out of their blowback marker.