Hi Bletti
I wouldn't recommend having the board so far forward as you can't get your leg out to support the bike, especially when you put your foot down on some gravel etc. in a carpark and your foot slips sideways. Been there, done that, fallen over :-)
My board sits further back and more upright. Also check out the pneumatic hose fittings that I have installed over existing bolts. They are extremely handy, quick release and cheap. I replaced the bolts with stainless cap head screws that I machined down to fit inside the pneumatic fittings.
These pics are a year old, I have since made a frame that lifts the board up more vertically so that the bottom of the board is at seat height..
Cheers S