Hi just wanted to ask if its possible when purchasing steel tubing you can have plates welded to both ends with requested tapped holes? also after reading from an old thread on here i seen some people say to never rely on 3d drawings when it comes to actually putting the pieces together in real world. what i mean is if i can get steel plates made and drilled from my drawings and then welded onto the steel tubing directly from the same company would i expect problems matching those holes to the rest of the gantry?

sorry if this sounds confusing and thank you in advance