Yes,on the 30's it is important to take note of where the piston ring end gap is located because it is pinned but on most 25's where the ring is free floating,it doesn't really matter.As stated before,I didn't pay close enough attention when taking these engines apart so I wasn't sure how the connecting rod came off the crankpin direction wise.I didn't remove the pistons from the connecting rods so everything is still as it was originally there.It's just always nice to put things back together again and running in the same direction that they were originally operating and running in for years.It's not usually a good idea to run bearings in an opposite rotational direction after they've been used for quite a while.That was my only concern here.
With regards to the crankshaft,you are right on both counts there.I have one of each in front of me and they are as you described.Yes the drill rod crankpin is pressed into a hole in the counterbalance that goes the whole way through.No doubt,both are also probably splined to prevent any chance of movement this way or that away.No fillet joint on this one.Straight 90degrees.