Hello, Have driven my FiST for about a day, and this morning was my typical freeway commute to work on FiST (about 40-45 minutes drive, could be faster but I don't go over 65 mph for now). Noticed kinda like a "WOOOOOOOOO!" sound when I'm in gear and my foot is off the gas pedal. When I put my foot on the gas again the sound goes away almost instantly. This "woooooo" sound especially heard when I'm going downhill while in gear and my foot is off the gas. Is it typical? Maybe some kind of transmission noise? Thanks.