Hi guys,
Well, they aren't perfect but they seem pretty good. If you want super tough and work as close to perfect as you can get, go Traxxas. TRX4 axles are REALLY good but you have to pay. Check out Jenny's RC for authentic TRX4 axles removed from brand new trucks. These Injoras are about 2/3 the price for me and it seems like that might be a bit steep because they didn't come with sealed bearings at the front CVs, the CV quality isn't quite as good, the input shafts are a bit of an adventure and the t-lock actuating isn't quite as good. If they prove to be very durable, the value is there. If they are significantly weaker than TRX4 axles the value proposition is dodgy.
One of the hard lessons to learn about custom stuff is that a lot of bits and pieces don't fit perfectly. I don't know how big a deal it is that TRX4 center driveshafts don't fit out of the box but it isn't nothing. Are TRX4 owners the target market for these? Probably not. I know I see a lot of complaints when parts that "should fit" don't fit. The t-lock cable being a bit of an adventure seems like more of a problem, but time will tell.
Overall, these seem pretty good. Stay tuned for a deep dive.
Wrench to drive or drive to wrench?