Should I add bitter apples?

[Motorbikeman]

I have 3 producing trees this year.   50 percent taste like Gala apples 25 like granny smiths and the other 25 percent are bitter cooking apples with a little bit of sooty black fungus. The ones in the big bucket.   Its only surface mould.   

 probably 45kg altogether.   


Should I add bitter apples to the juice for cider?   Will it give it balance or make it horrible.  I got a press and a plaster mixing whisk to pulp.   

 cider newbie