Hi. I have stupid questions about the Wings exhaust. I installed NOS to my 990 Adv, but badly read the installation manual and did not make clean before installation. After the first long run the engine (about 10-15 minutes on low / medium revs - stopped when the fan is turned on) there was a light smoke from the exhaust for 10-15 minutes. I've already wrote a message to Gorazd Marovic, but I suspect I will get an answer here faster. I have two questions: 1. Could the silencers damaged by this? 2. Should I remove the silencers and clean or am I going to have to wait until the dirt burned?