Does anyone use a bubble level mounted to their rifle or scope?

I think I need one. I have really bad vision and my crosshairs look like they are leaning when they aren't. My scopes are mounted without cant. They were mounted with an EXD ENGINEERING VERTICAL RETICLE INSTRUMENT and a plumb line, then checked by shooting at a target with a plumb line while adjusting the elevation turrets. It's not the set-ups, it's me.

I was looking online at a bubble level called the ScopeLevel. It mounts on the front of your scope and is folded down against the scope when not in use. When you want to shoot, you swing it up so it is now a few inches above your scope and you ca see it from position. It is made from plastic, so I don't know how durable it is.

The other product is from Sinclair. It is called an offset level. It looks like a scope ring with a bubble built into it. It says you can see it from position and it is made from aluminum.

Does anyone have experience with either of these products? (I am not interested in a more expensive option right now.)
Thanks


The never-ending flight
Of future days.
Paradise Lost. Book ii. Line 221