The Extruder gun is a very good item and the results are great. The only drawback is the price. The Extruder Gun itself costs $65.00. That makes it expensive to put one in every crime scene vehicle. If you could get a delivery device for the Extruder cartridges that cost under $10.00 would be great. What I am referring to is a sleeve and plunger unit that holds the Extruder cartridge and fits into a regular caulking gun. That's right, a regular caulking gun that you can get for $1.99 at any hardware store. You place the sleeve in the caulking gun, insert the Extruder cartridge with its tip into the sleeve then place the plunger into the rear of the Extruder cartridge. Once loaded, squeeze the handle of the caulking gun to bring the caulking gun plunger in contact with the Extruder cartridge plunger. You are now ready to use it just like the $65.00 Extruder Gun.