| It's not a surprise to me that people have problems with metal work. Unless the fabricators are being given a proper engineering drawing with proper geometric dimensioning and tolerancing, you are leaving the form and fit to chance. You can't simply take a ruler and measure your spacing between holes and then tell them to drill a 1/4" hole. It's not that simple. You are better off hiring a mechanical engineer to do the CAD drawings and getting it right the first time. Then when the part is made the shop can do a real QC check against the drawing and not some random notes jotted down on a napkin.
This is coming from a mechanical engineer by the way...
Brad |