We're opposites. I just bought a masterline and sold the stick. The stick is awesome and works well. The only hiccup I found is you need to learn how much helium your compressor leaks. So in my case if I was pumping 30/30 I would set it to 30/35 and would get perfect 30/30. I was frustrated at first till Imcalled Wayne. I hadn't thought about loss after the stick through the compressor.
I was actually going to keep the stick and have the masterline as well, but I'm also moving to a rebreather soon. I suspect the masterline and my home built nitrox stick will work just fine. I'm not pumping enough helium to warrant having a nitrox stick, trimix stick, and a masterline. I thought about selling my home built nitrox stick, but it made more sense to sell the one I'm using less.