Phil.
Thanks! Won't be long for you now......
At around 2yrs old, Mia took an interest in
everything Grandad was doing.
"What dat/ wot doin, Daddad".When she could climb up onto the step stool, and see on the bench, very little was secret any more!
Dunno where from. But, she found an M6 wingnut.
I screwed it onto 6" of studding, with a nyloc nut on each end. She still loves it!
OZ.
Thanks! I can't do video games. My son despaired of me.
But, Mia would rather play with Grandad's, simpler toys.......
Now, we've caught up to present day.
Mia hasn't seen this, since last mid summer. I really hope she's forgotten about it. But, somehow, I doubt it........

Set onto mill. Align crank axis with 1/4" silver steel shaft.......

48mm in X. 18mm in Y. Spot face, and drill/ ream through, 4mm........

Rotate 180* Offset 18mm 'tother side, in Y. And spot/ drill/ ream to 4mm......

1/4" slot. Blummin chuck jaw's in the way.......

Add temporary, pre used, crank discs, plus cranks........

We got a finger engine........

It works very well, for a temporary set up!

I will show the permanent parts, as they are made. Plus an action video, eventually.

My only worry, is what Mia will think of her engine, when she can't dismantle it........

David D