Hello all,

Here is my dilemma, I need to make a few flat patterns and am having trouble comming up with a good method. I am looking for a final ZERO THICKNESS flat pattern to end up moving into autocad but thats easy enough. The problem is getting the complete shape together.

What I have been doing:

1) Knit surfaces together

2) Thicken the surface outboard of my important face.

3) Flatten bends (sheetmetal toolbar)

This is when the tab disapears :/

4) Take a dwg of the flat and take it over to autocad where I add the flap back on and have my way with it.

QUESTIONS:

Why does the tab disapear?

Is there a way to trick it into bending to a non planer surface?

Any help would be greatly appreciated!!!

Attached is a sample file