I just installed my antenna today (I hope it is going to work)But it turns out that I did not buy enough coax cable.Is it fine for me to get an extender and just add another 25-50 ft or should I return the cable and get one cable that is 100'? The guy at RadioShack told me that it would hurt the signal if I bought an extender and added another 25-50ft. So...Should I return the 50' coax cable and buy a 100' or just buy a connector and get another 25'-50' of coax? Also the grounding wire was not long enough either (only 40ft.) WOuld be be OK for me to buy more grounding wire and just twist it together with the other wire to extend the length? Thanks for all the help! I can't wait for my HDTV receiver/decoder to come in and I just immediately hook it up to my antenna. Thank you for any and all help!