Rock The Bike:
Improvised fixture.
Rock The Bike:
Same but different angle so you can see how simple it is to make your own fixtures. Couple recessed holes in a thick wall tube chunk allow you to position a tube.
Rock The Bike:
Improvised fixture used to cup tube. Note the use of the black stepper pieces to hold the positions of your fixtures.
Rock The Bike:
Improvised fixture.
Rock The Bike:
Likely bottom bracket fixture.
Rock The Bike:
The blue rope was on the jig when we got it. It's holding the angle. Don't know why the previous owner thought this was necessary as the main pivot and locking system is pretty beefy.
Rock The Bike:
There are threaded points all over the frame of the jig that use the same T-handles. They make changes to the various angles and help you lock positions.