How to dig the narrowest 3' deep trench or minimize sand fill for a wide trench?

[future_vision]

I’m honestly surprised our provider still allows overhead considering they’re responsible for tree damage up to the meter. The jet line takes 10 seconds to pull through with a shopvac and plastic bag. I’ve done it one piece at a time by tying a weight on the line and dropping it through one piece at a time but the shopvac is way easier.

And I understand you run the risk of getting your jetline glued to the inside of your conduit if you do one at a time.