My view of this is that on the Genius ratchets (I've got 4 of them: 2 @ 1/4", 1 @ 3/8" & 1 @ 1/2") is that where the reverse lever/ratchet head meets the swivel head there's a NASTY (cut you open, draw blood) PINCH POINT!!!
I've taken the reverse levers off and personally modified them to eliminate the pinch points. What I do is grind the outer edges of the reverse lever/wheel so that the outer edges are flush and thus eliminates the pinch points!!!
Warranty - I've worn out two of these ratchets - Genius Tools USA, based in CA, gladly sent me replacement tools, with out questions or returns required within a resonable period of time!
NOTE: Not the same as SO. Having tools in many differnt locations makes it difficult to SO in all my locations, but definitely gets my work done without having to schlepp tools from one job to another!!