hey,
I’ve installed fun_plug on my DNS 323, however it wasn’t worth the effort.
Also I set up the NFS server on my NAS with the original DLINK addon. It only works properly if i set * as host. It just doesn’t work if I use a subnet, but that’s not a problem at all - only more work for me.
First of all I tried out adding a new NFS source in Kodi file manager. It works much better than the samba source, but movies stuttered also a bit.
So I mounted the NFS share via fstab according to @Tom_Doyle instruction. It works really well now. No stuttering and buffering any more. Thanks for your help 
But why is mounting via fstab so much better? Respectively why is NFS via adding sources not the same?