Suggestion #803

Autominer 10m Silk touch upgrade might be too much in survival

Unless I'm missing something and you can farm something more valuable than just stone for 7 a piece, pretty sure I have the math right that it would take about 3571 hours, almost 150 days, for an autominer to repay the cost of the upgrade.

Theoretically the cost of fuel or stone could also be changed but I don't really know what the intended balance is