recently found a couple of 29 trucks....one had the usual worm drive rear but the other had one ive never seen. it looked just like the car banjo rear except 3x bigger! the cantalever springs and torquetube bolted just like they should. it didnt appear to be something cobbled in from another vehicle. it also wasnt the clamshell type from the later trucks. did i find some rare oddity or just something that doesnt belong ?