I've posted this ten times and I'll post it again for all of you people.

The D3 is an ASIC-based miner. It can only hash one algorithm that it was physically designed to hash because of the way ASICs work. The Baikal miners and multi algo X-series miners were FPGA miners that could be reconfigured to hash different algorithms with a firmware update (FPGAs are designed to be modified). No firmware update can add more algorithms to the D3. Only a new miner release could do that, and it'd require Bitmain to make an FPGA-based miner which would also decrease the efficiency of the miner.

Signing this will not do anything and it wouldn't even if Bitmain wanted to. There's no way to "add" algorithms on to existing miners.