No need to appollogize, I should have made it much simpler - for example having something like a vacuum cleaner was a missed chance for a joke - and much simpler shape - no animation needed and movement in all angles possible. Refueling - the original idea is friction it just slows you down, but it wasn't ballanced as it should be, because of time presure .... you are right, still reading this was very valuable to have my eyes opened again. Thank you, really.