I'm thinking to buy manual juicer. I considering two options: plastic auger one or thick aluminium press.  Like this:    And this:  
Looks like the top apparatus gets my vote: takes care of breaking up the juice vesicles and the pressure of the top plunger helps squeeze it out.  I find so many unpopped juice vesicles in my Mexican citrus press (bottom picture). Too much pressure and I get unwanted bitterness from oils of peel  