Lifting a full flow-frame box

Take 2 @Robin_Banks.
You could convert to the Long Hive. I don’t have any experience with them but there is plenty about them on this forum. Just search Long Hive.
Bushy actually mentions long hives on his web site as a way to overcome heavy frames and boxs.

Edit:
In here Long Hive Long Hive? you will find this:
https://forum.honeyflow.com/uploads/short-url/7KJia00apxTcrzWngF6BZGGAfWm.JPG