The snow broke my old well cover so I found the right size at Menards except for the part that fits under the vinyl siding. There are about 6" on the right side of the well cover that is hitting the siding, the part of the cover that is supposed to slide under the siding. If I cut out that section, I feel like water or varmints could could get in and even though I could jam it under the siding it won't lay right. Any suggestions?