I am going to give Derma Rolling a shot and combine with minoxidil. Where is a good place to buy a reliable Derma roller and what needle size should I get if I want to do 1X a week treatments? I looked on the internet and many of the Derma rollers out there look cheaply made. Since I’m messing with my scalp I want at least a trusted and reliable brand. Any suggestions on where to buy would be greatly appreciated (and on what size needle to use for first timers). Thanks.