so his problem might be caused by having thrusters on as when they are on they cause it to clang out or atleast that is what i have found when printing it

Thanks GuitarEC, glad you like the design.

As for your printing problem, the welder wall is definitely big enough.

are you printing layer by layer? This can be done using butting for increasing and decreasing minimum distance on the piston. This has been the only reliable way for me.

Or are you letting the piston retract all the way in one go? No matter how slowly, this usually leaves out some blocks, especially in the more complex designs

I love the design, but it was a real bear to print for some reason - lots of blocks that didn't print, and I had to follow behind and manually weld things - sometimes having to grind out surface armor to get to inner areas (gyros, projector, etc). FYI - my printer is a 5x3 grid, piston travel is only 0.15 m/s.