This print technic I used to avoid support and to get model flex, assembled and locked with pins after the end of a print. And you are not limited with number of modules. You can build it endlessly if you continue with Levers instead Rings.

Print instructions:

Z=0,2

Prepared  printed parts should be cold and not banded for next process!

First you need to print 7pcs Lever 1 (the one with 3 holes)

Then print 7pcs Lever 2 (2 holes and a pin) This one You have to stop at Z=4,40, put Lever1 on it and print forward. After print Levers1&2  are locked and flexible.

You get 7pcs like this:

Then you need to print Markers with pins and use the same technic. Stop a print at Z=6,4

Put Levers1&2 on it and print. ! Locked pins must look down! !

Be careful that Levers aren't banding higher than next print Z. (You can use office tape if lever is banned over a pin)

On the left and right Marker you need to put rings on 4 pins.

Print to the END  and have Fun