Davo. Its not that I'm skimping on the frame. The base of the frame is the table, but I'm building up the frame to be a lot stronger and sturdy than just the table... Take a look on instructables at printtable you'll see the design i'm using as inspiration. Just as a coreXY system.

I'll have a think about the 80/20... I might just use that too.

Thanks

Dan