This is probably directed more towards those in the field of engineering but id be happy to hear from anyone. I've been making these air riffles for some time now and these types of projects have lead me into a mechanical engineering major. Im looking for co-op positions now and was trying to put to...

Based on prices I've seen so far and that emachineshop site, getting things machined won't be an option till I can use my school's shop. Is there any data on the strength and properties of the epoxy pistons and such? That looks like the next best thing for now.

As I've gained experience in my various design hobbies, I have found that I frequently need custom made parts that are Very difficult to make without expensive machines. Does anyone here have experience with this kind of thing? I have seen the online shops where you just send in your design and they...

Thanks Ranger, That was the trick! I don't really know why that would work but it did!

Ok, I Know that most people who post here are computer literate and I know that I am not so I don't want anyone flaming me for asking stupid questions, or not reading instructions or not searching or any of that. I'm just bad with computers, not lazy. I've searched the forums and have in fact seen t...