Calidus can actually help PTDI greatly, they have hundreds of engineers from Embraer and Novaer who moved to the UAE and have experience in developing passenger aircraft.
They can help develop the N219 and C235 further.
They also have a 105mm version of their 8x8
They can help develop the N219 and C235 further.
They also have a 105mm version of their 8x8