Your calculations look sound EZ providing the arbitration financiers are very charitable.

I think that for them to put up the funds to finance the company and the legals involved in the arbitration they would require a little more than a slap on the back and their money back.

I would expect them to ask for a substantial share of any settlement or at the least a signficant number of cheap options so they could participate. Otherwise why risk their money on a court case with possible collection difficulties even if they win. Better to buy government bonds and save the risk and hassle?