Well, HOWDY Paul... <again.. 

>.  Happy to see you finally posted!! 

Some of us got a bit spoiled with our manual chargers over the years... 
My chargers (same model 'twins') run at 20 amps. ( I purchased this model purposefully..  

 ) 
10-13 years ago there were many more 'choices'..  

I am more concerned with the 'light' weight cables/clamps on some of the new fangled power supplies, as Electrolysis demands are substantial...