Even your delete tune isn't going to reduce any soot buildup 'after' high mileage. Come on.I'd gladly be proven wrong. Show me a GDE tune that reduces the intake buildup by 75% after high mileage (50,000 miles/80,000kms) I'll switch immediately.
I'm all about 'the prove is in the pudding'
Until then I'll gladly take my EGR/DPF deleted diesel that purrs like a kitten.
I'm talking real time soot reduction. There's no magic pill that's gonna reduce accumulation and damage that's already done.