Our team has been using the new VEXPro two stage ball shifters for about 2 weeks now on our practice drivetrain. Yesterday while driving, one of the hex output shafts slid out of the gearbox. After some investigation both with the CAD file and disassmbled gearbox we realized the output shaft is just press fit into the gearbox. After reassembly by tapping the shaft in with a hammer and what seemed like a solid fit, we put everything away for the night.
During today's meeting we drove the DT around for a few hours before the shaft came out a second time. We are wondering if anyone else has experienced a similar problem, it seems like our pit crew might have one area to keep a very close eye on this season.
Pictures below for reference.
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For the love of God,please post the hint. We're starting to lose control. - johnr [more] 
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