Center Section strut end forming

[cajunflyer]

For the D center section, there are 4 streamline tube struts that get "crimped" to bolt to fittings on the sing and fuse. What is the best way to do this? I saw an article in an old Sport Aviation (that I cannot find now) that showed a method of heating and squeezing on a form in a vice, which sounds like a good method to me, but I'd love to get everyone's input.

 

[Dennis Flamini]

 

[smizo]

 

[christopher]

 

[cajunflyer]