A lil birdie told me that no window masks come in the BX kit so I have some including 2mm window border masks for if you want nice consistent borders, computer designed and plotter cut in low tack vinyl. £1 +p&p, bargain.
Even if masks DO come in the kit, mine are better as they have the window border masks included. !
and no, i dont have a yokomo bx yet before anyone asks.