spudtyrrant wrote:i'm kind of a newbie at sketch-up but how do you use only one fitting from a set i can't seem to figure it out
If you open sketchup with a library of parts, you can do it a couple of ways.
One way is to "save as" your cannon file, then delete the parts you don't need.
The other is by opening sketchup twice. One session of sketchup is the library file, and the other is your cannon file. You would copy the parts from the library file and then paste them in your cannon file.
There may be other methods as well.
I do not use sketchup to create the parts, because I use a different CAD program that I am proficient at using .
Maybe some one who is a "sketchup master" will also reply.