I am thinking about getting a 25" Light bar for my MS400. Won't be used much, but for the occasional 3 ft tree I may need to cut. I have heard that they are noticably lighter and balance out well on the 400, but I have also heard these bars are bad about flexing and throwing chains. Yall had much experience with these? My old Rollomatics have never caused a minutes problem, so switching to a headache makes zero sense. By the way, the 400 is an awesome saw once broken in. I am on tank 6.