Marvelous Designer Support

Hi,

i need to create a fitted bed sheet for a client, which hangs / lais diagonal over a mattres. I tried for hours and days but don`t get the desired look and control over the scene. 

I need to have the following:
- the diagonal needs to be straightened out
- the elastic band needs to keep his form while following the side of the mattress
- the wrinkles should be less in amount, but bigger and more equal in size ( 10-12 wrinkles in total )

Could anyone please give me some help on how to get a better and realistc setup fot this task ? Attached is my scene file and some examples i like ( despite the pathway of therounded elastic band on all of them...i need to have it more straightened diagonal from the left top to the right bottom of the matress )

I worked with pins to have the sheet to stay in position...but this gives some unwanted deformations to the sheet and band. I can attach my project file to this thread, but unfortunately didnt find a way to do it.

Thanks a lot

Robin