Quote
uncle_bob
The problem with the decoupling resistors is that they really *need* to be at the source end of the lines. That would put them on the Due board by the ARM. They have already run a long way before they get to the Ramps. You have "stuff" all over the place as a result of the fast rise / fast fall edges.
Also, with the layout we have (due to the Arduino header), that area is already very full, so getting components into that area would be difficult and require a lot of rearrangement.
Some of it I have already been considering, but unless it's really needed, I'd like to avoid it. for an idea on the level of work, it'd probably be a lot easier to completely wipe the board, move all the components about and lay it all out again.