Maybe worth to read the old technical reports. I think in one...

Maybe worth to read the old technical reports. I think in one report a figure of US$20m was mentioned. Troy can get a small part of the underground way cheaper ("partial underground techniques").
The underground will require serious drill efforts, that is the main problem and why you can forget the resources there for now.
IMHO completely meaningless as the market is not giving Troy any credit for underground resources. Generally a good idea to look down the road 4-5 years but not in the case of Troy. The interesting time frame is 1-3 years after the debt is paid off. Do not forget we have a low LOM but also low p/e (roughly 1), very different to a 10 or 20 year LOM miner with a p/e ratio of 15.
In the past I had great success with short LOM / low p/e situations as anything more than 3 years down the road is for free.