Dig holes below the water surface – not easy to control.?
Perhaps like selling elastic bands by the meter – question of trust.?
Undercover digging
Le Drake Noir
Andrikken
Dig holes below the water surface – not easy to control.?
Perhaps like selling elastic bands by the meter – question of trust.?
Le Drake Noir 
Good analogy, both are difficult to easily visualise 🙂
Yes, a matter of trust. 🙂
Indeed 🙂