Cleaning the switches did wonders for the speed on mine. I would try that first, since it's easy. Get some contact cleaner at Radio Shack ( if they are still in business
), and just spray into the sides of the switch while operating it ( power off if still plugged in- I took mine out for this operation). X2 on the express window upgrade. I installed GM modules in my Elky, and they work great. Takes 4 modules, if you want up/down on both sides. Or you can buy the aftermarket module.