I felt same way. I'm honestly not trying to encourage you to do it your self, just sharing my exp. silicone is amazing stuff especially the rtv. It takes an incredibly small amount to hold glass. Look at all of the rimless tanks with tiny seams. I just made a slightly larger seam on mine to make sure. Also, and this is just a general statement, the place that reseals it has no real investment other than getting your money. If the tank were to fail they would not be liable nor claim any responsibility. This is the primary reason I researched the heck out of it and DIY'd it.