Ref HRC vs LRC blocks, I find that the HRC block feels more consistent through the entire turn. The LRC feels as if it grips harder to begin with but it will let go more violently.
The HRC block feels a little looser to begin with but after a few laps, the increased consistency tends to mean that the overall lap times are lower.
I watched one of our team drivers make the change from LRC to HRC yesterday on dry astro. The first few laps were a little loose but within 1 battery pack, his lap times had come down by over 1s average.
It's been debated a lot and I can't comment on the theory but in terms of feel, the HRC block is nicer and more consistent.
Rear toe would help lock it in under accel but the compromise is often in the longer turns where less toe will allow more corner speed.
I'm assuming that you're hitting the throttle when you say that it kicks out? Possibly move the rear hub link in to the B position to generate more camber gain and ensure that you're running the taper wedge under the front and the front link is long.
I'll be honest that I always tend to stroke the throttle and allow the speed to build rather than trying to fight wheelspin but then again, I have been told that I drive like Miss Daisy
