Technical How to finish a fabric corner on roof

I have covered the roof of my 29 'AA' but need some help getting over the front corners. The attached picture shows where i stopped gluing! The material is the usual roof vinyl with a heavy woven backing.
Need good suggestions on how to heat? cut? stretch? to get the curve done.

 

Have you tried a heat gun?

 

A heat gun helps but you need a good pair of stretcher pliers to pull the material. HRP

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Danny, thanks, ordered a pair.
Neil