You will find the XX4 very neutral in set up tbh... There is not a lot of difference in those base set ups from Delves and with some cars the differences between grass and astro set ups can be huge.
I haven't run one for 10 years but they are very balanced and easy to drive so not something you will have to tweak a lot... can't wait to give it a blast outdoors next year though!
The piston rounding trick is a great mod, i tried it in 22SCT and was so impressed that i'll be carrying it over to all cars... Astro tracks tend to be hard packed underneath and have lots of little bumps so the quicker reacting shock with these pistons really works a treat.
Cheers Chris and Andy for your tips
