So that John Candle doesn't have to type it all again here is a thread that explains the reason to drill out the rivets.
Question is still "Is this such a superior antenna that you would want to mod it, or is there an equivalent antenna out there that already does this"
"Yes you can drill out the rivets. If in the future if you would like to put them back on , use a bolt and a nut for each one. Removing the reflector bars makes the antenna into a 2 direction antenna. The reflector bars are there to increase the forward reception of the antenna , the signals that are being received at the front of the antenna are received by the V shaped receptor wires and also reflect off the reflector bars to the V shaped receptors thus increasing the reception. The reflector bars are also there to reflect some of the signals at the back side of the antenna away that could interfere with reception at the front side of the antenna. Removing the reflector bars does reduce the forward reception ability , but , does allow more reception through the 'back side' of the antenna. When the signals are strong at the front side and the back side of the antenna then it's Ok because the , signals are strong. So you might say , I should tell every one this information , And I say , this Requires A LOT of Explaining each and every time."