May want to try the h&t race springs with a 24 or 25mm bar to start with the race springs are 325 front and 375 rear so with a bigger bar you be able to losen the back up.
My rides a 2002 SVT track car, & Boosted 2007 ST with the SAP.
The helmet has a special meaning for many drivers. How important is it to you? - It protects my head.
Do you have any special rituals when the helmet is concerned like many have? - I wipe it so that I can see better.