re:  Pa, we don’t have an excavator was the statement for my middle daughters youngest boy.

That is a cool hybrid crowie.  Like the use of that timing belt.

Just don't tell the lad there is a lowboy or trains and rolling stock.

 If your first cut is too short... Take the second cut from the longer end... LBD

Thank you Alex, the second time I've used "Timing Belts" as crawler tracks, works a treat, but not cheap!
He's not into trains so I'm pretty safe on that front, Cheers Peter