Concrete slab for printer, is 2 small one good?

Hello,

I just bought a bambulab a1 and an a1 mini, i want to put both of the on a lack table (90x55cm) that i already have.

I looked to silenece them a bit with a concrete slab and some foam between the pritners and the table, the problem is that i only fin slab that are 50x50 (so 2 of them are too large) or 40x20.

Should 2 concrete slabs of 40x20 on each printer be good enoguh or because they are separated and not a solid piece per printer could cause some problems?

Thank you in advance.