Yes, mine are close to Maestro's work and close to Brez's spreadsheet too. But I like Brez's spreadsheet better as he has both methods for valuation side by side. They include ECL's approach that I used, ie $/unproven/proven and net amount of oil in barrels to ERHE after all expenses/taxes etc. Both methods give close end results.
If any of you missed it, Brez has a fine resource developed and I thank him for sharing it with this board.