Just to report; I have continued digging deep, level 12/13/14 and gone near 3k blocks building my
'straight as an arrow' railway.
I got really tired of walking it so I built myself a mine-cart railway after a little reading (when I discovered rail track in my first abandoned mine). Started it about a week ago.
I am not reading up on the items yet too much, just preferring to dig and explore. I get a kick out of keeping the line straight. This means ongoing blocking off or diverting those pesky water and lava flows. Luckily I worked out the 'hold on' key so I don't fall

into lave pools.
I got bored pushing the mine cart I guess and smartened it up electrically (red-stone power

)
I have just discovered my 3rd abandoned mine. Boy they are complex structures and those little hidden traps are getting interesting. Lots of wood too.
Just found a mine cart with an Enchanted Book (Book of Enchantments).
I said earlier, I am so glad Santa is going to surprise me with 4 hard cover 'all about & how to' books so I can read up on all this new world.
[color=#FFBF00]Physicist [/color][color=#FF4000]of[/color] [color=#0000FF]Q3W[/color]