I would like to know if a Ramps 1.6 board could be used to upgrade from a Ramps 1.4 in the Robo 3D R1. Here's a link: https://www.ebay.com/itm/273027430202. The next question is about using a TFT35 touch screen. Here's a link: https://www.ebay.com/itm/272993734745. The seller has no idea about any of these things. They just sell the products, and don't have any technical information about them. Do I need to edit the firmware or are these things plug & play? According to several listings with the TFT28 & TFT32, it says that they don't require firmware modifications if they work with the Ramps 1.4 board. I couldn't find any information about the TFT35. Those smaller screens list several features such as low filament pause, power outage print recovery, an option to connect to a WIFI board, customized screen icons, etc. Do those screens have all of these things built in or does it require a separate Raspberry Pi (or is one already integrated into it)?