So here's the cost breakdown for my order (Batch 4) for each k16 (16 chips) which was paid on the 26th of June, (assuming $104.5 USD / BTC).

1.376 BTC = 16 Chips
1.278 BTC = 1 Board
0.765 BTC = Shipping ($79.95 priority international option)

And assuming that we only get 95% of the chip costs back and 25% of the assembly cost back it works out to be:

1.3072 BTC / 16 chips
0.3195 BTC / Board Assembly
0.765 Shipping

I actually ordered 3 k16's (48 chips) which cost me a total of 9.0196 BTC
If I opt in for the refund and the above is correct I'd get back 5.6451 BTC (37% loss on investment)

If a new chip is found to be useable on a modified k16 unit, would there be a further refund on parts which were purchased for this group buy, or a credit to those of us that stay the course?