Andrew,
I thought I was the only one in this situation. I have an old Schluter heli I am rebuilding with aWebra 61. The engine was seized and I basically did the exact things you did. The engine started fine and ran as if it never sat for a long period of time.
I am going to just fly it and if it become necessary, buy a new engine later down the road.
But for now, it is running just fine.