Mini Office Workbench #4: Laying out the Index holes 

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Boys and Girls,
                                                                                                     
Another one of Murphy’s relatives was in the audience and got me distracted in trying to postulate the use of the 3rd. pin.  
(Pictured are the 3 pins and the one joining screw on the right.)

If you watch the video, you’ll know what I’m on about…. and that backing board, it is not a failed mini with the dog holes gone rabid. 
 
After RTFM’ing I still don’t know what the 3rd. pin is used for, however, this picture in the manual shows 3 pin’s
Though one is “greyed” out... I presume its an alternative position... so I'm still none the wiser.
 
Nevertheless, the RTFM did bear some fruit and showed than when “Pythagorassing”, I only needed a pear of pins to locate each ruler’s end and use the drill guide with the longer spigot to anchor the two rulers,
 (the length of one spigot was the thickes of a ruler while the other is the twice the thickness of a ruler).

That do-whacky (joining screw) is only needed when joining the apexes of the rulers on small boards the Pythagoras rule does not “align” on the board surface… it actually "bolts" the two rulers together... don’t know what I mean… buy a UJK Parf system and RTFM yourself. 
 
If you feel sorry for me and would like to see me try to save face, check this video,




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

So, that turny-knobby thing is a ovoid vernier to adjust your angles? 

Three pins so you don't call them up at 0-dark thirty (their local time) to whine about loosing a pin and begging for a replacement 🙂

 SplinterGroup
 commented about 6 hours ago
new
So, that turny-knobby thing is a ovoid vernier to adjust your angles? 

That thingy is used to lock the two rulers (through the appropriate holes) at 90° when the apex is off the board.  After RTFMing, I found that if the apex is on the board, one of the drill guides has a longer spigot to align the two holes
 

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