well swallow the concept4 looks more flyerish then the actually both firefly old and new one wich by the way it has transformed in a train wagon or something....i forsee Lane trouble with that one is too bulky(and Ugly!);the kujira is ok, a bit undecided on how it wants to be..but ok, i just hope it keeps its current agility and size in 4.87; you are very talented..just pls dont make the ,,not so right decisions,,... be cause later it cannot be undone!! keep it up