If it will be car + attached bed (with animation up, down) + physics tailgate (without lagging) and that all with collisions then I will bless you 
When I can expect the next release?
PS: Watch out on the SK bed, look what it doing when it is attached (SM bed keeps correct collisions but you cannot animate it easilly): https://www.youtube.com/watch?v=0NqKbnd0LsQ