[ForSale-Swap] Power supply question

[RAY FRIESS]

I have a question about Astron power supplies.
I have two of them, each 20 amp capability.  Is it possible (permissible) to connect them in parallel so that I can
power a radio and an amp or several other units that added together would draw near or more than the 20 amps
one would supply?
 
Elementary theory we learned as a novice says that when you connect batteries in series, the total  voltage is the sum
of the individual voltages and when batteries are connected in parallel, the total current is the sum of the individual
current sources.   So I'm wondering if the same would apply to connecting two Astron supplies in parallel would give me
the sum of the individual current capabilites of the two or if something would go skee whumpus because of bootstrap
circuits or other designs inside one or each of the Astrons.  Perhaps they would buck each other.
 
Looking at the schematic, I can't readily tell if there would be a problem....