Concerning Voltage and Current douibling

I just got a pedal power 2+ to (you guessed it) power my pedals. I have 2 pedals that are causing an issue. EHX Freeze - which takes a whopping 140ma and a Diamond Memory lane - 18VDC at 125ma. My initial thought was that I'd have to double the voltage on 5-6 (150ma each) for the diamond and double the current on 2 other outputs (100ma each) for the freeze. I've since thought that maybe I could just use outputs 4 and 5 with a voltage doubler to get 18 volts at 125ma (right?) for the diamond so that I won't need a current doubler for the freeze <- is that sound electrical theory? I'm assuming a voltage doubler is just splicing 2 output cables together (and swap polarity for the diamond)? If my theory is no good and I need a current doubler too, how do I make me one of those? Cheers.
 
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