As of now there are two similar Duplo Hinge bases:
13358 Duplo Brick 2 x 2 Hinge Base (with the hinge on top), Origin at the top of the snap
15450 Duplo Crane Base 2 x 2 with Hook Holder (also has a snap hole like 13358, but the origin is at the bottom)
We should still synchronize the origin there, I prefer at the bottom of the part like 15450 (connection of snap and studs)
We could still add a !HELP with the connection info (hinge position)
All other parts who connect there should have the origin at the hinge...
parts I found:
24156 Duplo Arm 3L (correct, could need a !HELP for the other hinge)
13359 Duplo Train Crossing Gate Crossbar (correct)
15449 Duplo Hook (correct)
3574 Duplo Plate 2 x 8 Seesaw (correct)
some parts which arent done yet, but still belong to this hinge family:
13341 Duplo Crane Arm 5L
13366 Duplo Winch Drum
19663 Duplo Ladder with 7 Rung with Locking Ring
19443 Duplo Ladder Long with Locking Ring and Drum Narrow Ridged Holder
19451 Duplo Crane Basket with Locking Ring
17178 Duplo Cannon
13358 Duplo Brick 2 x 2 Hinge Base (with the hinge on top), Origin at the top of the snap
15450 Duplo Crane Base 2 x 2 with Hook Holder (also has a snap hole like 13358, but the origin is at the bottom)
We should still synchronize the origin there, I prefer at the bottom of the part like 15450 (connection of snap and studs)
We could still add a !HELP with the connection info (hinge position)
All other parts who connect there should have the origin at the hinge...
parts I found:
24156 Duplo Arm 3L (correct, could need a !HELP for the other hinge)
13359 Duplo Train Crossing Gate Crossbar (correct)
15449 Duplo Hook (correct)
3574 Duplo Plate 2 x 8 Seesaw (correct)
some parts which arent done yet, but still belong to this hinge family:
13341 Duplo Crane Arm 5L
13366 Duplo Winch Drum
19663 Duplo Ladder with 7 Rung with Locking Ring
19443 Duplo Ladder Long with Locking Ring and Drum Narrow Ridged Holder
19451 Duplo Crane Basket with Locking Ring
17178 Duplo Cannon