I am in the same position as you, roughly. I have been breeding Kune Kunes for about 5 years now and up until now have sold all the piglets either for breeding or pets. However I had 2 boars, which I did not get castrated born in February. They were not good enough for breeding although could have been registered. I decided to keep them for meat. They are now 7 months old and I am about to send them on. I think as its the first trial I will make all sausages as I am not sure how fat they are. As you say, they don't look all that big compared with 'normal' pigs. However I understand that after 7 months all they will really do is lay down fat.
I have a couple of friends who have used Kune Kunes for meat. Andy Case (Starting with Pigs) says he has the back legs boned and rolled and the rest made into sausages and swears they make the best sausages ever. Another person makes them into joints, chops, etc., but admits the joints and chops are small. I think its a case of experiment.
Let us know how you get on.
Di