Very slowly...

How many people will it take for you to believe that the tube is NOT what holds the nipples in place? There are thousands of double wall rims that have gone millions of miles without the spokes loosening up.

Yes, the tube may keep them from going completely slack on a single wall rim. But if they're that loose you'll start breaking spokes either way. PROPER TENSION is what keeps the nipples from loosening, NOT the inner tube.