I am working on an updated supply. It will help more with PICCOLO2 performance than BUGLE2, but any sort of improvement like this is good. Hopefully they will be for sale this summer.
For now, you'll have to give this a try. The output needs to be floating though - with neither output tied to EARTH. The other option is to use a dual supply (+12V, -12V, GND) and remove U1.