Small problem.
Object 'DiggerExplosionEmitter' is not a member of the 'ParticleEmitterData' data block class
WARNING: AddDamageType() - Digger file "add-ons/Script_Dig/CI_Tool.png" does not exist!
Object 'DiggerDrawSound' is not a member of the 'AudioProfile' data block class
Object 'AxeExplosionEmitter' is not a member of the 'ParticleEmitterData' data block class
WARNING: AddDamageType() - Axe file "add-ons/Script_Dig/CI_Tool.png" does not exist!
Also the Dirt is pointlessly huge and yet 15 hits with my little digger destroys the brick forever. At this point I deleted the mod.
None of your new bricks have icons they just sit there with ?'s as their picture.
Well, In V8 you all remember the DigMod/Woodcutting Mod? This is almost a replica.
This I feel is the main problem, there is 'almost' nothing new. It plays like a port not a new version of the mod.
In additon you state there is one command, yet there are eight. You could have easily made it have four (Checking, buying, help, and on/off toggle) commands and have the help command actually help rather than spit out the real commands that are used.