Completely unbderstsnd where you are coming from.
I have a very basic understanding for what's involved.
Having worked for a builders merchant and used a hiab on a regular basis I feel I have the basic skill set and understanding to go further.
I'm not sure there is any other way of gaining on hand experience directly without obtaining a ticket as you put it.
Ive done the very same thing, if you can use a top seat hiab or palfinger, you can drive a digger. Exactly the same, you just have a bucket instead of a brick grab.
Dumpers are simple to use, your have no problem there i wouldnt of thought.
Dont forget your drivers CPC, more moneys the wankers are taking off of us!