never fear T2 - I will be an expert at the end of this process!
Riedel shears (what i was calling a 'brick-wall' type structure)
Dilational jog - ah! now it makes sense.
I am still searching for a trench open cut (where you might drive in one end and out the other), vs the traditional circular open pit.
at 0.045 I might be poor, but am learning hahaha
