I have seen several posts on the IS windscreen installation that indicate incorrectly that the plugs need to be destroyed to remove. The plugs on each side of the rear seat moulding can be removed by using a butter knife or similar utensil or tool. Start at a point where there is a slight gap somewhere around the plug and pry gently, moving evenly around the plug. Really not that difficult to remove without damage. Also, the windscreen installation kit is necessary to properly install the windscreen to the attach points at the base of both rear headrests and the two inserts where the right and left plugs were removed. I found my install kit at Bell Lexus of North Scottsdale. Hope this helps.