If I have one card in my comp and mining local to my wallet, I mining in a let's say an "pool" because I point my miner to a server (my wallet). So ... what is a definition for SOLO MINING? Spreadcoin is in fact a solo mining coin (depends of what is understanding everyone from solo mining). Public pool is another thing and SPR is not suitable for it.
Have you ever mined any other coin at MPOS pool like nonce-pool ?
If yes,then you'll find pool mining spr works as well as you mine other alt coins.