a 2 ton shop press with a v shaped wedge and anvil work really well, no busted fingers and less effort, that is if you got one avail., you could really take the effort out of it and use a hydraulic log splitter,.... any business where you can buy custom made hydraulic lines has a type of crimping machine that crimps the fitting from all sides at once, ive used one of these, and the collets are interchangeable for diff size lines , but if thats not yur cup o tea, then use a floor jack and sandwich the fitting under a car, all these methods have worked for me in the past while i did alot of welding lead repair and didnt have a big enough crimping tool, sometimes you need to improvise