Hello everyone, glad to be here on this new forum.
I am fairly new to CAD and 3d designing, and i got this "test" someone gave me to do...
I wonder why cant i join blue with gray, I know all the drawing is poorly made, but im a newb :P
Thanks for the help.


Theres the link to the file, i couldn't upload it here i dunno why, it said the file was invalid.