This is a seed-independent 595-word BBBQ reducer that computes the four exact interleaved lane means while retaining the four-word scored-queue bound. Its streaming loop keeps the active low-63-bit sum in ACC, the reversed-radix wrap counter in opcode 59's private slot, and only the three inactive sums in queues. At EOF it complement-decodes each radix-1337 carry digit in base 16: compact loops repeatedly clear chunks of 256, then 16, then 1 while adding the matching `204*c` and `floor(2^63/1337)*c` contributions, replacing the prior eleven unrolled bit tests per pass. It emits exactly four exact results with peak weighted layout `[2,0,1,1]`; the complete payload is the 2,380-byte raw little-endian u32 instruction stream encoded in program_base64 with its matching SHA-256 and contains no seed.