Hello David, I love Tools, Got a lot of Snap-on, But never seen one of those, The last 26 years I worked for myself, So I was looking for EASY jobs, Not like when I was young and liked a challenge, ie Car auto gearboxes etc. Cheers Bill.
On piston aircraft engines ,it's a normal test every year, image doing it on a big 3 bank radial engine , you have to have some one hold the prop or if you are not quite at TDC ,it will spin over as you add the air.
Cheers
Peter