My driver's window was doing the "tilt" thang too. After taking the door panel off, we noticed that the plastic window tabs were both intact, so we left THAT part of it alone, though I had the improved brackets "in hand". We solved the problem just by pushing the window ALL the way forward adjustment-wise; it now works PERFECTLY, and moves faster than a guillotine! I'd try THAT before I did ANYTHING, assuming your attachment tabs are still intact - just my 25 cents...