Inverting dbl + 1NT is absurd.
I see no merit in this.
I strain to dbl a minor with many hands,
and want my partner to infer that when I pass 1C or 1D,
I almost never have a decent hand.
I am very much into dbling 1C even w hands like
AJxx Kxxx A xxxx or
AJx AJx Kxx xxxx
In addition to all this,
from a frequency point of view,
the inverting is silly.
The overall system strikes me as
an attempt by someone who had too much time on his hands
and wanted to produce something different.