at the moment there is a guy who has created a stunning program called wings 3d it is free and is basicly a weaker version of mirai ^6000.00 app he created it becuase he couldnt get ahold of nichmen to buy nendo if you want a modeler id say dont spend anything and go for this app it is amazing and free ! im not sure of the site but its at google so search for wings 3d and give it a try