I have a question regarding the Eastwood hobby gun. First is there a repair kit for it. The other is lately as I am shooting the powder it has been building up inside the chamber and then when I shoot it blows out extra powder on top of the powder I already shot out. I have tried adjusting the air between 10-15 psi also I added a desiccant dryer before the gun. The powder is about 2 weeks old and in my garage which has been cool inside. I have used the gun alot so I was wondering maybe something wrong with the gun.