Like Peckish I use a Janome Fmq foot on my PQ1500s. The foot I use is the convertible Fmq foot for the Janome 1600 it comes with both a closed and an open toed piece that can be switched out depending on what you want to do. It does not hop, rather, you adjust it so it just skims over the fabric. it has a thumb screw that you adjust to get it to just the right height.
Rob