I have a use case where I have added a vehicle (from Fleet app) to Timesheets as a Many2One relationship. This allows me to track what vehicle was used on different time sheet entries and vice versa in that I can see the timesheets in which that specific vehicle was used. 

That said, sometimes a timesheet entry uses 2 different vehicles - think a Low Bed Truck AND a trailer. Using two many2one relationships does not work here. What would be the best way to go about solving this conundrum???

Any tips much appreciated.

Kind regards

Jamie