I agree with small gauge wire!
From the picture in the link it looks that one channel is twisted and hence the whole construction might just be star quad (which I like on paper). Question is really what "small awg" really means? Audioquest Type 4 seems on the larger side with 2x17awg and 2x20awg.
As my speakers have 99db or more efficiency I definitely dont need thick wires. I am thinking 2x18awg and 2x20awg at the max or even 4x20awg. I know not typical orthodoxy but Acoustic Revive and Morrow (and DNM) seem on similar path..