Rednet Connected Cobble Generating Turtles

[CC 1.33]
I had a few hours to spare and wanted to learn how to program turtles, so I attempted to build a cobblestone mining system, teaching myself using the Wiki.
In my system, an unlimited amount of turtles can be programmed to mine cobblestone, then turn around and spit the cobblestone out (I was playing on Tekkit so I collected the stone in obsidian pipes to be turned to diamonds in a condenser). The turtles each have a screen above them showing how full each slot is, if the slot is full it displays "FULL". Each turtle relays the total blocks it holds over rednet to a main computer, which can display the total for each turtle or a percentage showing how full it is.
The entire system is held by eight programs on one disk, which can be auto-installed to the turtles or the computer (it detects the OS and installs accordingly).
So what do you guys think? It's my first project so are there any improvements I could make?

http://pastebin.com/JFQ5HH2T

EDIT:
Pictures, as requested.
http://imgur.com/a/BWBUU

Add pictures please.

Done :)/>/>

Please add a tutorial on how to set it up. Thanks