hey citivolus i think you and Space Oddity are right. we are getting 2 restraint bolts installed tomorrow and a seatbelt strap - cost approx. $150. (current restraint bolts already in use!)
the weight of the light bucket x 40 is a massive force (nearly half a tonne?) and theres some horror stories out there.. so i dont want to spend the money but i will be much happier having done so!
thanks all
and yes Geoff, not hitting anything
is plan A