YES! I was just blind (and havent scroll this page to her end).
If You have a little time, can You explain me one thing more?
Equipment increase time of mining by 10% and chambers by 5 minutes each? The same time of mining? If I have lvl10 of eq. and lvl10 of chambers one "Start Mining" will be work:
(5minutes + 10x5 minutes) * (1 + 10x10%) = 55minutes x 2 = 110 minutes?
Yep, looks good to me. If you have them, you have to mine only once every 2 hours.