I hate that Cardas won't accept bananas (with ease). It's silly in 2017.
Bananas is an inferiour construction afaic , but my cardas LS terminals have a hole in them to fit a banana plug so you can use them with cardasconnectors, they accept both spade and banana.
Ps actually the cardas LS terminals are :
Long billet Copper posts, Rhodium over Silver plate. Billet Copper nut, Gold plate.