I to am running an os8 plug and have so far found it very reliable, my engine is new and i have only run about 1/2 a gallon through it but i have a venom temp unit on board and its a great peice of gear i'm running with my hsn at 3 turns out and my lsn at 2 turns and it flys already and the temp stays at about 210, also i'm running at %20 nitro and %20 oil and all seems great (but the temp sensor is tops)!!