I’m heading to Canada for the summer and will be hooking up with Shaw Direct. Their dish has four outputs and I want to use 5 or 6 devices (1 DVR unit and 3 or 4 non-DVR units). They are using a PICO Tru Spec TSMS 4/8 switch that has 4 inputs -two of which are 17v and two are 13v. The Zinwell and Eagle 4x8 switches are 18v/13v units and are much cheaper on eBay (8 times cheaper). Will they work with this 1v difference?