Ted, many thanks for the reply, I thought that would be the answer.
Do you think adding some weight to the bottom of the dome would help it? I'm just trying to think of a way to make it more user friendly in the water
I'm planning to get in a pool soon to test it all out and want to take with me some options to try
I'm not Ted, but can share my experience, in the hope it helps. I used to have a 6" acrylic dome for the 7-14. To combat its handling issues, I bought an ankle weight; one of the ones you fill yourself with sand, and then I experimented with how much sand I need to make the dome less inclined to tip up. It helped, was not completely successful because the weight was too close to the housing. I was thinking of using tape, velcro or glue to attach some lead strips to the bottom shade portion of the housing, and then learned that there are stick-on weights that can be found at hobby/model railroad shops and for balancing tires. I don't know how well they stay on underwater because before it came to that, I moved to a 7" glass dome that would accommodate the then-new 12-40.
I would suggest you try the stick on weights. They are available on ebay if you cannot find them elsewhere.
That solved the problem.