I have a psi box and it doesn't have any of the reported issues, but from a lot of testing, all I can say is make sure the mesh between gears is spot on, I shredded both idlers in mine about a month ago, I'm not sure if the mesh is off as it has had a lot of use, about 50 race nights without even looking at it ( yes, over 1500 minutes of racing plus about another 15 or so races on carpet) so I'm not sure if it is an issue or just not using preventative maintenance. The PSI box doesn't have a locating lip on it and it seems fine, both sides are machined flat so it would be very difficult to have dirt get in, when I ran dirt (more then carpet) it wasn't an issue. Visually your case does look better, it looks very professional, but at the end of the day its all how it works. Does it have the lip around the layshaft like the stock one so it locates the motor plate like the stock one? The PSI one doesn't and that would really make it wicked.
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