Can you tell me why the window opener handles are catching on the window rubber, when it arrived last week it had blanks on where the handles went, but i found them in a box of bits that came with the van. However as you can see they catch when installed. I Have tried to adjust at the slider at the top but it still catches I have checked the opposite static window and it is a different size, as i was going to swap them over. Any advice would be much appreciated.