9KG for definate.
because i had put 9.2kg in befor and it kept pushing the door open. but i hadern't filmed i hoped this time it would do the same. but it didn't. i just put strain on the motor. you can here it struggling
after i stoped filming. i took out 2bath shhets and a hand towel to reduce the load to 7.2KG and reduced the time to 120mins