dblain

for the first time today. I only removed the bolt. The top piece of the bolt has some burrs or rough spots on it torwards the barrell end on the very end of the bolt, it also has a couple on the top of the part between the two o-rings. I am not familiar with exactly how this gun works. I polished both parts back smooth with a dremel tool. Is this o.k.? Will those marks hurt the performance of the gun? Should I get a new bolt? I saw some on ebay either made by or of derlin not sure what that is but would it be worth the 25 dollars to upgrade the bolt? Also, what is a low pressure chamber, do I need one?
thanks,
-d
sorry for all the questions.