'Otter'. Build log.

[Neale]

With the top of the steel box section being the bed for my linear rails, would skimming a very tiny amount (possibly 0.1 mm or less) from them with an end mill give a flat enough surface to mount on so the epoxy can be skipped altogether?

My 1.8m long box sections had a dip in the middle of about 2mm one side and 3mm the other. Tricky to machine flat when the wall thickness is 3mm to start with! However, I don't know if this was "as supplied" or welding distortion but it is why I went the epoxy levelling route. Plenty of discussion on the forum about that. I did add doubler strips inside the box section to give a better bite for the rail holddown bolts

[mekanik]

Hi Buddy
Have a read of this,
http://www.mycncuk.com/threads/6546-...o-straight-%29
Regards
Mike