[Bosch 1590 EVS jigsaw]

Part 13 sitting on the rotor needs to be where the line leads - the channel where back and forth motion would make the blade go up and down.  I did that and the motor runs but no action from the blade.  The broken piece initially felt like a piece of drill bit.  Took it apart and it is a broken piece of the front armature shaft - a $45 (lowest price I found) part so will give it some thought.

[Bosch 1590 EVS jigsaw]

Quite a bit smaller than #9 - has some rough spiky bits which say it probably broke off.  Looks a bit like this

 

[Which one is best corded or corless?]

Cordless tools are wonderful 'til you need new batteries.  Prices are mind boggling - similar to replacement ink for a printer.

[Bosch 1590 EVS jigsaw]

My old jigsaw was underwater for a few days so, after letting it dry, found the blade release slider on the front wouldn't go all the way across.  Took it apart and a little piece, a bit over half an inch long, a quarter in diameter with spirals on it, fell out.  I did get the blade free but now the motor just runs but the blade is stationary.  Obviously that piece did something important - any thoughts?

[Been abusing power tools for over sixty years.]

That's my story and am sticking to it - going on 84 now and still breaking them.