When i had a hyper 8 i did a few things to make it handle better.

Drill all the pistons out to 1.5mm with 45wt in the front and 40 in the rear.I also used some craddock disk brakes with just the metal calipers.helped brake strength and consistency heaps.This made the car a fair bit better.I too think the car is underrated and its very competitive.

cheers