Yeah basically let me explain you.
People install sunroof by just creating space for it & in accurately place the glass inside & due to error the rubber seals are unable to hold for long & they get leaked. But the idea im proposing comprises of purchasing sunroof of the same model car with complete upholstery.
Either buy from pillar top or long pillars..
And sunroof is attached using spots. Like you open the old roof spots and again place the sunroof on same spots & install four pipes which are present in any sunroof car... This system never gets leaked & have personally done this on my own nissan 2000 & few other cars aswell...
So this job is not for inexperienced denters...
That's the logic behind it. And that's the reason we're offering leakage warranty.
There won't be a single leak... When sunroof will be purchased we'll inspect the rubber seals on floor properly and test the slider and tilt action of sunroof...
Once this job is completed no one would be able to identify the spots or the joints...
I hope you understand my point..