Irving2008

Nope - no probs if the base is removable, and there is no issue regards edge radius - square, rounded .. whatever - use whatever tool you have. I'd say from true square to as much as 2mm - 3mm will be fine.....

What do
What do you have in mind regards fixture for top/bottom lids (?)- so long as the wall thickness is sufficient for small self-tapping type screws, that will be fine as I intend to cut a gasket in any case.