I had a new transmission with the updated synchros installed about 15k miles ago and my shifts have been night and day different ever since. Very rarely I will get a light grind from 1-2. I believe that adding the IDEALG slave would remove those but it's not even often enough to warrant spending the money on at this point. I'm on my phone and frankly don't feel like dealing with finding the post but I posted a video a while back of my 1-2 shift after the new transmission. I've got the Barton short shifter with a Hurst T-handle on it so I can rip the shift pretty fast.
Born on the Island and raised in the sand.