Experimented with 30 psi at front at Curborough Sprint to reduce the chronic understeer. Seemed to help and certainly reduced the squeal. I have since kept the tyres (Avons) at this pressure as on the road and it is definitely much better than at 22 psi (pre Comfort Kit) and then 26 psi that I used to run.
Rear tyre is 25 psi. I have no mods, other than the Comfort Kit.
Give it a try for yourselves