RE: Picco .46 laying around
Welcome to RCU first off! Those Picco's are bad *****. [)]
The rear exhaust limits you quite a bit. I really think the Rifle by Angel would be a good fit but I think he has discontinued them or at least took a break from making them for awhile.
The Patriot and F-20's are too draggy for the Picco so I would say your best options are the quickee airframes like the Viper/ Predator or a delta like a Dust/WHip/Phenom/ Demon.