Anyone tried upgrading the RAM from 2 x 1M to higher capacity ??

Good work on the chubby-hat, read about this on hackaday.io. 

Unrelated to chubby-hat, did anyone tried upgrading 2 x 1M RAM to a higher capacities ??

I was reading the ESMT datasheets but have not much experience with FPGA memory.

Thanks

( pls close this issue if it is unrelated )