well, just look at some other campain (involving sailfisch?)

https://www.indiegogo.com/projects/g...2#/updates/all

53 updates an photos of production.

so if the problem's miscalculation in the first place, as I suppose, this should have and still could be communicated, thus stating just as how much money's needed to finish.

I don't believe in refunds, as a good amount of the money's spent and thus gone.