DIY dough divider (manual)

Hi

I’m regularly making 3000g of dough which I than cut into 3 x 1000g. In that process, I often cut twice or three times to get the 1000g (with a scale).

Now I’m considering building a DIY form (with metal sheets) that would cut the dough in three equal pieces. Idea is to put the dough into a square plastic container where the DIY cut-form would fit precisely and cut in three even parts.

Anyone did that before? I could not find similar ideas on the web.

Further ideas or criticisms?

thank you