326x326mm bed support for J-Bot Core-XY?

I can't support a 326x326mm bed with the existing models because I don't have enough space for the holes in the corners.
You would need both these mirrored things for the corner holes.
I use the JonnayLin support for the 3rd hole, but for a 4-hole bed you would need 2 pairs of these ones.
The design is meant for use with springs with a 10mm diameter and spacers like on http://www.thingiverse.com/make:323057
I did some countersinking because I like washers to spread the burden.

The space-p