Since in 0.17 capacity of all belts was increased and ore mining mechanics simplified and mining speed slightly decreased maybe need to speed up omega drill to 45 items per second? Because description says that drill's output is full express belt.

Since in 0.17 capacity of all belts was increased and ore mining mechanics simplified and mining speed slightly decreased maybe need to speed up omega drill from 37.5 to 45 items per second? Because description says that drill's output is full express belt.

I may just have to add the word 'nearly'. As it stands, this drill almost exceeds engine limits for ore output.

Looks like without upgrades, but with research, it can still manage a full belt.

45/37,5=1,2.
+20% = 2 levels of mining production research.