I use a KR808D-1 most of the time but I use my passthru when I'm near a USB. I had a brand new carto (from Good Prophets) filled with a 50PG/50VG e-liquid and it tasted ok. After a while I switched the carto on my PT to one (also new and from GP) filled with 100% VG e-liquid and it tasted a little burnt. So I filled another (also from GP) with 100% PG and it tasted fine. To conclude: Passthoughs work best on juice with PG.
