Just a note on power supply capacitor size. This is a very common misunderstanding. When the capacitor is "small" then the current through the rectifier is limited by the capacitor's impedance and a larger cap will draw more current. But once the capacitor is "large" then the peak current is limited by the transformer's resistance. The boundary between "small" and "large" occurs when the series resistance is on the order of the capacitive reactance at the power frequency (i.e. 60Hz). In the old days of vacuum tube rectifiers, this was important and still is, but solid-state rectifiers have a much greater peak current capability relative to their average current rating and such supplies are usually designed with very "large" capacitors.
For example, in the Seduction the power transformer resistance is 0.58 ohms (including the reflected primary) and there is another 1.2 ohms before the capacitor, for a total of 1.78 ohms. At 60Hz, a 1500uF capacitor would have that reactance, and the stock 10000uF is obviously "large", and a capacitor even very much larger will not draw much more peak current.
I just now modeled this in PSUD, and the stock supply draws 1.9826 amps peak. With a cap 10 times larger, it draws 2.016 amps - only 1.7 percent more. So if you can find room for a larger cap, it will work just fine, and will reduce the ripple on the heater supply. I'm not saying you can hear that, just that it's OK to try it and find out if you can hear it. :^)
