At $1800 gold, say average diluted grade of 12g/t Au (let's not...

At $1800 gold, say average diluted grade of 12g/t Au (let's not include any silver credits) and lets assume production rate is 100tpd...
Total maximum production is 1,200 grams per day. 10% lost in recovery and 10% lost to the smelter which nets 972 grams per day or 31 ounces.
31 ounces at $1800 per ounce is ~US$56,000 per day x ~28 days per month x 12 months per year = ~$19m per annum in sales.
total tonnes mined and processed will be ~33,000 per annum

Average cost of mining will be ~US$200 per tonne if done manually for ~$6.7m per annum
Average cost of processing at 100tpd will be ~$85 per tonne for ~$2.85m per annum
Development and exploration costs to replenish and develop resources approximate $3m per annum
G&A costs of approx $2.5m per annum
Total Costs of ~$15m
EBITDA at 100tpd of ~US$4m per annum

The catalyst for a re-rate based on Gold Links only is a 250tpd operation
At $1800 gold, say average diluted grade of 12g/t Au (let's not include any silver credits) and lets assume production rate is 250tpd...Total maximum production is 3,000 grams per day. 10% lost in recovery and 10% lost to the smelter which nets 2,430 grams per day or 78 ounces.
78 ounces at $1800 per ounce is ~US$140,643 per day x ~28 days per month x 12 months per year = ~$47m per annum in sales.total tonnes mined and processed will be ~84,000 per annum

An increase to 250tpd will require no additional G&A costs nor any extra people to run the mill but will require more money spent on Development and exploration to replensih resources.

My estimate of what happens based on a mechanised mining operation of 250tpd is as follows

Cost of mining 250tpd mechanised is $100 per tonne for US$8.4m
Cost of processing at 250tpd will be ~$50 per tonne for US$4.2m
Development and exploration costs to increase by 2.5x from US$3m to US$7.5m
G&A to remain at US$2.5m
Total costsof ~US$22.6m
Total sales of ~US$47m per annum
EBITDA at 250tpd of ~US$25m

Additional upside could be had if an ore-sorter were used as more tonnes could be mined and the ore being processed will yield a higher number of ounces

Throw in Colosseum depth potential and the ~6-700,000 ounces that have not been mined yet from the 1.1m ounces of gold that were drilled by BP, then you have some serious upside and that's before allowing for potential of finding something that may resemble Mountain pass