Mark 4 build - step 1: Triangles: assembly 1

Spliting posts, they get unwieldy with the web poster.  If anyone can recommend an offline poster I'd be interested.

Once you have the tools, plastic and vitamins gathered, assembly can begin!
These are what we're building in this step:

 

1. Tap your extrusions.
1. There are three round holes on each end of your extrusions - the middle hole of these must be tapped.  They'll accept an M5 tap straight from the factory.
2. Be sure to use thin oil for tapping - re-oil the tap a couple of times during the tapping.
3. One turn forwards, half a turn back.  Aluminum is soft, but don't overdo it.
2. Pre-thread your T-nuts.
1. This is tedious, but it's a lot less tedious than trying to move the nuts into place afterwards.
2. You'll need 12 T nuts and 14 M5 screws - the two extra screws are for the tapped holes.
3. The channel takes 6 t-nuts, then each flat side takes three more.
4. Insert the screws all the way through the holes, then twist a t-nut on one or two revolutions.  If you go too far, the extrusions won't be able to slide on.

5. 

   Loosely fit T-nuts

   
   

    

    

    

    

   8 T-nuts on the inside, four in the channel

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