The first I shown is a 3 cutting edges saw, generally too thick for milling such tiny channels. This one below is better with smaller cutting edges (like JFettig's pic) :
Thickness can be 0.15mm -> 0.15mm channels wide possible (need extreme care and slow advance
) . It's not a problem to use 0.5mm saw when channels are not too tall, which is the case in the MP05.
A polish friend made 0.3mm channels on 8mm height (!!) using saws, it's really the limit because copper is too soft and bend very easily under milling constraints (EDM is better here) :
