Any plans to design bigger boards?

[ArkBrj]

Hello,
Looks like this is a great project and I am considering making one for myself.
However, I actually need a bigger heating element, like 100x70 or so.
I am thinking about modifying your design, but that would put this project on hold for some time.
I guess there might be some complications related to uneven temperature distribution and such, so it might be not a straightforward change.
I wonder if you have any plans to do it yourself.