Fitting leather into round corners

[JeannieH]

Hi everyone..so I’m trying to get my round corners perfect...I cut slits in the gusset... but I’m still getting buckling around the corner. Are there any tips or tricks I can use for this type of construction? 

[dirtclod]

You can try cutting some small triangles out. Try it out on some scrap first.  I never have tried doing it that way, so it may or may not work.