And just like that, they emailed me a 5% discount code - 5off - just because I looked at the item But I think I have enough (five),,, at least for now.James, my first HP 01 is a 2014 model and still running strong - they're built like a tank.But you need to oil the first-stage piston wick enough to keep the second-stage piston seal wet... if that made sense...and use light weight oil so it can move thru the cylinders instead of getting gummy and tacky - Wyo