Read the thread about Rupes pads not needing to be primed. Is this due to the pads being open cell or is the compound DAT. I can attest to the fact a primed blue pad on the Rupes Nano will sling everywhere. When I used the Nano with 1" pad I didn't even put any on the pad (I smeared on the part and polished away with the 12mm orbital). Much better.