I tried the RD file before bed last night. I got very good results - hooves, ears, snout and mane. I've also noticed I'm more energetic than usual, and even though I'm always a tad boast-y it felt slightly elevated today (just based on a few conversations, I'll keep watching this to see how it develops). I'll probably do it tomorrow night again, I did a 40k bike ride today (remember I said I was feeling more energetic?) and I'm sure as soon as I lay down I'll be asleep so no chance to listen.