Pioneer (DM-40D) speaker box stand

I customized stands for our speaker boxes from pioneer. They are printed in black PETG from sunlu. 
The stand is slightly tilted. Ideal if you sit down to listen. I am a beginner designer, i think there is room for improvement, please let me know. I made this design in tinkercad with no knowledge to design. 
please rate, comment and print my design. Following is also nice ;) 

i used 4 M5x30 screws. I didn't have the ones wit the flat head, so i used regular ones and put a foam pad over them, to protect the boxes.
i also used 4 small foam stickers in each corner to protect the box on the top of the platform, and 4 foam stickers on the bottom to protect the table and for more grip.

Thank you!