I use a Sealey VS820 brake bleeder which works well on my 75 - I guess it works the same as the Eazibleed.
However, much the same as you I found I was unable to use it on my partners 25 as it has an odd shaped cap.
You can get a 'universal' adaptor cap for the Sealey unit, maybe there's something similar for the Eazibleed?
Not sure how effective it is as it looks a bit like some sort of torture method.
Though I don't have that so resorted to a technique I had read on the forum - syringe the old fluid out of the reservoir, fill with new.
Then the old fashioned method of an assistant to press on the brake pedal while you attend to the bleed nipples until the fresh fluid comes through (quite easy to tell in this case as the old fluid was nasty).