Is it possible to pay more for the down payment in order to pay less later when it's time to complete the order? What happens if I put 500€ in down payment for just the board, and the project is abandonned? I know you said that backers would be refunded based on the unspent money, but would my refund be based on the 350€ amount (value for board down payment in the shop), or the 500€ amount actually paid?
When you say Debian, which version would it be? Would it be a normal desktop version? The stylus would be supported like a mouse, just like in EasyDebian? Would it be full support? I remember that not everything could work in EasyDebian.