The problems of improper airsoft gearbox shimming

Raptors Airsoft have an interesting new blog post:

Hi, Raptors Airsoft has a new blog post The Problems of Improper Airsoft Gearbox Shimming  on our blog.  This article talks about the problems you will face if you shim your gearbox incorrectly. 

Thanks, Mike (Raptors Airsoft)