Very nice. But weird. I was actually doing the same thing this...

Very nice. But weird. I was actually doing the same thing this morning.
Looks good to me I just used a slightly higher Cu price based on Fridays night close of 4.06/lb *2205 ~ 8950/tonne

I also did sensitivity of just MCB HG section and Opuwo at a higher cut off 0.1% to see.
And looked at commodities at time of each JORC, more relatvent for Opuwo.

How do you feel about the 5% of IGV rule of thumb, as a very rough valuation?

5% IGV In ground value
Philippines	Total mt	Cu Grade %	Au Grade g/t	Cu Metal mt	Au Metal moz
MCB 0.2% cut off	313.8	0.48%	0.15	1.51	1.51
MCB 0.5% cut off	93.7	0.80%	0.28	0.75	0.84
Saygay
Maiden JORC 12 Jan 2021, Prices used as per Jorc date and current	At time of JORC prices			At curent prices			At time of JORC prices			At curent prices
Philippines	Cu USD/t	Au USD/oz	AUD jorc	Cu Price USD/t	Au Price USD/oz	AUD jorc	IGV USD	5% of IGV Rule USD	5% IGV Rule AUD	IGV USD	5% of IGV Rule USD	5% IGV AUD
MCB 0.2% cut off	7938	1850	0.76	8952.3	1784	0.79	$14,756,246,974	$737,812,349	$970,805,722	$16,184,144,523	$809,207,226	$1,024,312,944.46
MCB 0.5% cut off (HG section 27yr LOM)	7938	1850	0.76	8952.3	1784	0.79	$7,510,836,648	$375,541,832	$494,133,990	$8,215,483,613	$410,774,181	$519,967,317.29
Saygay							$-	$-	$-
Link to JORC ann
https://clients3.weblink.com.au/pdf/CLA/02329948.pdf
Namibia	Total mt	Co Grade %	Cu Grade %	Zn Grade %	Co Metal mt	Cu Metal mt	Zn Metal mt
Opuwo 0.06% cut off	112.4	0.11%	0.41%	0.43%	0.12364	0.46084	0.48332
Opuwo 0.1% cut off	66.4	0.14%	0.46%	0.45%	0.09296	0.30544	0.2988
Opuwo JORC upgrade
Maiden JORC 16 April 2018, Prices used as per Jorc date and current	At time of JORC prices				At curent prices				At time of JORC prices			At curent prices
Namibia	Co USD/t	Cu USD/t	Zn USD/t	AUD jorc	Co USD/t	Cu USD/t	Zn USD/t	AUD jorc	IGV USD	5% of IGV Rule USD	5% IGV Rule AUD	IGV USD	5% of IGV RuleUSD	5% IGV AUD
Opuwo 0.06% cut off	90000	6835.5	3400	0.78	50000	8952.3	2866	0.79	$15,920,959,820	$796,047,991	$1,020,574,347	$11,692,773,052	$584,638,653	$740,048,927.34
Opuwo 0.1% cut off	90000	6835.5	3400	0.78	50000	8952.3	2866	0.79	$11,470,155,120	$573,507,756	$735,266,354	$8,238,751,312	$411,937,566	$521,439,956.46
Link to JORC ann
https://clients3.weblink.com.au/pdf/CLA/01971421.pdf
Totals	IGV 100% of metal @ JORC prices USD	5% of IGV @ JORC prices USD	5% of IGV @ JORC prices AUD	IGV 100% of metal @ Curent prices USD	5% of IGV @ Current prices USD	5% of IGV @ Current prices AUD
MCB 0.2% + Opuwo 0.06%	$30,677,206,794	$1,533,860,339.70	$1,991,380,069.41	$27,876,917,575	$1,393,845,878.73	$1,764,361,871.81
MCB 0.5% + Opuwo 0.1%	$18,980,991,768	$949,049,588.39	$1,229,400,343.83	$16,454,234,925	$822,711,746.26	$1,041,407,273.74	Sensitivity for higher grade mining options, possibly still economical at lower commodity prices, early mining option.