Decided I have had enough of replacing RAMPS/Arduino combos, so I decided to try out the MKS BASE V1.5. Looks good so far, but needed to mount it in the Robo3D R1. It is made to mount, not to the Arduino/RAMPS holes, but to the extra holes that are also underneath.
The one picture with the board is just for reference to see the size comparison.
I have printed, but not yet fitted yet, so more updates to come.
UPDATE 4/10/17: Board didn't fit right in the sideways orientation; blocked the power blocks. Redesigned for 'vertical' orientation. Will require internal usb cable.
UPDATE 4/12/17: Redrew the adapter to fit the board sideways. Laying it flat would require cutting some of the internal support wall, so I angled the mount so that it holds it at roughly a 16 degree angle, allowing the USB cable to clear the wall. Of course, if you print connected to an OctoPi (or computer), you will need to leave the cable connected internally and routed out of the case through the existing hole.
I added a mount for a 40mm fan to blow across the right side of the board, which is where the stepper drivers reside.
More pictures to come after mounting and test fitting.
UPDATE 4/14/17: Not quite enough room for the fan, so I played around a bit more, and then change the slot/mount. Top (which becomes the bottom) are 'bumps to rest in the holes, while the bottom are open for screws, zip ties, whatever.
Infill is really up to you. Should be strong enough at 20% or so.