It's definitely not bypassing the internal SMPS because..........
there is no internal SMPS in the Pro Plus that I use (or the Mini, or the straight Pro for that matter). So you don't need to bypass what is not there and the Mini, Pro and Pro Plus can very easily and simply be used with a linear power supply.
The Ultra does have an internal power supply-it would require some surgery to be used with a LPS (and there are some aftermarket options available but they're pricey).
Signed,
"Basking in the mediocrity, enjoying the placebo effect."
hdm

