Yeah, good question. Read that one clone does have the open draw pole (2mm @ deck opening) but don't know which; think it was a FT version. If we identify, we can request that FT stock for individual sales.
I have a build on FT mini so couldn't measure, but doesn't look like "open draw. Any others? What about FT's Silver box clone?
my mini came with an airhole that could just fit a 1/16 drill bit so theres that.