Just in case I gave the wrong impression earlier, I haven't had a problem with my Viasho 1W green module and PSU so far; the inside of the PSU is somewhat different from that shown in the photos, i.e. 2 resistors where the photos show 4.
Now it's installed in the projector, it seems to modulate fine, so I'm happy to 'leave well alone' and keep using it. Time will tell...