The memory has been refreshed by a cask-o-vino... Actually I bookmarked the site knowing I would inevitably forget it.

I made a few of "his" design, however, I'm always on the lookout for simple shaped puzzles that I can mass produce on the laser.   

Unfortunately I don't have any grand kids to spoil and most of my friends have brats that I just couldn't give a puzzle to, knowing they would just smash it like all their other toys/gifts... great upbringing.

So I try to keep them simple for freebies... however, I do like to make a few more complex ones for immediate friends, and SWMBO when she's speaking to me.

If you or anyone else is interested, this is a link to all the ones I have made, so there are plans/solutions and usually measurements available on my cloud storage.  Most are in SketchUp so they can readily be resized. 
Even though a lot are laser cut out of MDF, most have been plagiarised from solid timber articles/builds.

If your first cut is too short... Take the second cut from the longer end... LBD