Erik...my experience mirrors yours...the contours on the Scan Tech lenses aren't quite right, andI've had fits trying to get the parking/brake curcuit to work as the alighnemtn pins (and slots) are not the same as stock. Silicone might work for leakage ...not easy to see once installed anyway...I've decided that good used or ($gulp$) Volvo factory replacements are the only way to go...What really pxxxes me off is that I bought replacement Taiwanese lenses for my wife's '95 Ford Windstar van from a mail order house for just $35 and they're perfect in fit, performance, and appearance...why can't we get the same service for Bricks, of which there are a lot more on the road?!...good luck