thanks for that
Might be a better option to look for some OEM roof rails / cross bars (they are not cheap mind).
I found the locations to fit cross bars into the roof pockets didn't suit my roof box so opted for the OEM rails & cross bars as these can be adjusted to fit.
I paid £120 for the full set but needed a strip down & re-paint.
I'm not paying hen's teeth prices.
I'm planning on putting some hardwood rails on mine, old yacht style.
Bolted clean through the roof.
<dons tin hat & waits for howls of derision from all sides.>
You could use Rivnuts so the bolts don't stick through the headlining.