Make a 'laundry' build object 'Laundry Day' compatible?

Hi there

I created a few build items which look like outfit parts. They are based on sculptFloorGENBathLaundryPile as this item is easy to work with. As such it uses the prototype_RetailCompatible 115540 tuning which is not meant to be used together with Laundry Day at all. For now I only added the option to add it to the sim inventory. But I'm missing an interaction to add it to the hamper or washing machine.
I might use a script mod to add an interaction to the item while I wonder whether one did something similar already.

I don't plan to use the Laundy Day item as the object states and joined textures are complicated to work with. And it's tuning is quite complex.

Top:https://www.simfileshare.net/download/3615191/

In case you look at it in-game it will look bogus, 50% are colored without details the other 50% are raytraced. 50% use a normal map and 50% don't.
PS: The mesh has it's issues, it should be moved up a little bit and a proper outline would help a lot.