Road rage with 18v regulated output?

[zilla]

I'm doing an amp sim build for a friend who has the intention of using a 12v power supply with it (not negotiable)

I usually put a voltage doubler in my amp sims to run it at 18v but with his 12v supply he's going to by flirting with the voltage limit on some of my caps and I don't want to go to 35v caps.

Can I use a road rage and replace the 15 v regulator with an 18v reg and use an lt1054 charge pump and get away with it? 

Thanks!

Tim

[Scruffie]

Can't see why not.