Originally Posted by MuscleWeave
Thanks sman and drak, for your inputs.
As an aside, for drak, I'm wondering if the way you use a starting clamp to start your mains ever pushes a grommet out. Would it be better to devise a way of using the clamp on the outside of the rim?
No, I have never had a grommet pop out of place. The starting clamp rests on the grommet, not on the frame, and doesn't push it completely out.
For outside the frame, use Ash's method.