I used to have a piece of layered cardboard on top to spread the weight and it didn't sag enough to touch.

Over time it's sagged to the point we are at now. I've since removed the cardboard in a hope that they'll sit far enough forward to not touch.

Could train them to not hop on obviously, but its a multi-year habit for them at this point.

I'm not gonna lie I've always kind of liked them chilling on top but obviously my extruder gears have a different opinion.

Any ideas? Block it off? Add supports?

Thanks!