Hi there.
When I see TA15 Big Six, you get my attention.
But, building a Cabriolet out of this TA15 Big Six, is simply not correct.
What you did is cutting out the roof. Doing so is ok!
But the version you create by doing this, is called a "Decapotable".
From the TA15 Cabriolets where build though. Based on a very different chassis and having only 2 doors.
I did a project on this in 2013 for a campaign on this site.


When you want to have some references, just let me know.
Kind regards,
Robert Jan