I am just starting build number 2 of my Delta Hiparrion Trike. This one I am looking to make so it can be taken apart & transported on a plane or other public transit. So far I have the size down to 82 linear inches without the seat. This is beyond most airlines no charge airline bag size but still easily manageable. My biggest headache is finding a mesh seat frame that is hinged where the seat back & seat pan meet to enable the seat to lay almost flat. HP's Gekko has one but it is an integral part of the Trike Frame so until someone gets totaled I am out of luck. Does anyone know of a folding mesh seat? Thanks