I am new to using the C Band FTA. The angles that I have to point the C Band LNBFs on my 8 foot offset dish for the best signal will allow rain water to eventually go into them. It seems that most C Band LNBFs have the caps with holes in them. What do most people use in order to avoid having water run into the LNBF? Just going and getting some clear plastic and gluing it onto the LNBF, instead of using the plastic cap that it comes with?