Picked up a nice Echo PB 603 at a thrift store for $85 in running condition. Just finished cleaning it up and noticed the previous owner used a 8 heat range plug in it and based on the condition of the ceramic insulator, the stock 7 heat range plug(BPM7Y) would be a better choice. I run BPMR7A in my saws and therefore have plenty on hand, any issues using the 7A plug instead of the 7Y? Don't see how forgoing the V electrode tip would cause issues.