It sounds like you’re gearing up for a significant engine overhaul, addressing the cracked ringland with new pistons and a refreshed setup. Just as Linex coating Perth offers durability and protection for vehicle surfaces, your plan to re-coat the pistons, upgrade the gasket, and carefully manage tuning will ensure your engine's performance and longevity. Best of luck with the rebuild and the Haltech setup; a well-executed process should get your car running strong again.