Actually to be honest I forgot about that, thanks for pointing out. It's been 2 years since I build mine and I don't remember details. I probably got SNR version because I just used 110v AC to power it and I don't use any other power supplies. I am going to rebuild mine or build another one and add fuse based on your guys comments. I picked up this perfect sturdy metal box and I plan to put Lee pot on top it for more compact setup.