Sorry it is kinda hard to organize all this information. Here is where the resistor goes, https://www.vicious1.com/ramps-wiring/, if you buy it from here you will not need anything else from that page I do all the rest before shipping. If not that page handles all the ramps stuff.
I have the pictures taken for the belt guide but really its more to see how I do the cable ties, the belt itself is easy. SO easy I have never had a belt guide and have only been asked once or twice about it in the last year and a half. But I did take the pictures on friday and will be putting up the guide in a day or two.
Of course I can’t comment on the rest my opinion on assembly ease doesn’t really count. If you have built a 3d printer, this is the same thing just larger parts.