Anza researchers Quentin Kniep and Roger Wattenhofer have proposed two Solana Improvement Documents that would preserve stake-weighted slot allocations while ordering block producers by geographic proximity. SIMD-0674 would require validators to register locations on-chain, while SIMD-0675 would group nearby leaders into runs of up to three. A simulation using epoch 1038 mainnet data from 661 validators reduced mean leader handover latency from 36.2 milliseconds to 17.0 milliseconds, a 53% decline. Validators that do not register a location would be excluded from block production and voting under the proposal. The documents were opened around 29 September 2026; SIMD-0675 was marked ready for review on 30 September, while SIMD-0674 remained in draft. The design is linked to Alpenglow, Solana’s upcoming consensus protocol, which targets finality of about 150 milliseconds.