My trans had had the 2nd gear pop-out issue for the past couple of years, and this winter I finally decided to pull the trans and have it redone. Along with the rebuild, there were a few other things on my wish list. I had read that Gbox was making a detent that solves the pop-out issue, so that went in. I also wanted to swap the open diff for a torque-biasing unit from Guard Transmission, put in a LW flywheel, and replace the clutch with a sprung Spec stage 3+.
Holy cow, what a difference! Every shift is smooth, and I can feel the trans securely clicking into the gear through the shifter. The LW flywheel allows the engine to spin up much faster...but dropping down to neutral or taking off from a stop requires more attention. I've noticed the
TBD just a bit during street driving; I've got a feeling it will be more a a benefit in autocrossing.