Hardware: Intel NUC5PPYH
I have installed Jun's loader v1.02b DS3617xs using DSM 6.1. The box boots completely and is relatively stable. But I have encountered a problem with the NUC's embeded Realtek RTL8111/RTL8168 network adapter not playing well with the synology driver.
This is a known issue with many other builds and kernels. I have checked and can confirm that the driver that DSM natively loads is the same one that I have had a problem with after installing Ubuntu 16.04 Workstation on the same model Nuc box. 0000:03:00.0 Class 0200: Device 10ec:8168 (rev 15)
There is a fix, but it requires recompiling a file available from Realtek here. But that requires a copy of build-essential linux-headers to be on the NUC. There is also a problem where the drivers in DSM are not named conventionally so the Realtek make file will not find the correct files to replace.
So I think the only way to repair the problem might be to take a known working device driver from a similar Debian kernel, I already have one on different NUC Ubuntu 16.04 and transfer it to the DSM and rename it to the Synology convention. Don't know if this will work.