This board actually left behind, i ordered few bipolar stepper boards what i made (up to 42V and 2A / phase (4A)). Gotta see what they're looking like.
Next step is to lay components to arduino UNO shield.
When i accomplish that, i will post all files here (including files for the BatchPCB-service).
But first gotta wait at get the protoboard.
I'l hope that 42V/4A-powered stepper board would be interesting for some projects.
If not the addon shield, i can also post the "off-shield" so you can connect 3-4 drivers to UNO for example via screw shield.