The DA50 -like all the engines of this size -type -- use a bearing at each end of the connecting rod -- not a bushing.
these bearings are -essentially, a little metal shell with small hardened pins packed all the way around the inside.
Ideally -the bearing -in the rod -- pushes easily onto the crankpin.
NO slop.
If you are stationed in Timbukto- and have to do your own repairs -make certain the crankpin is smooth with no small lines around it - also the at the assembly allows easy rotation but does not have even a hint of roughness or looseness when rotating the rod on the crankpin.
The .001 movement you mentioned - is about normal but I wonder how you measured it .
If the engine is dry and the prop is at TDC, you will feel looseness - which really is almost zero clearance.