First let me preface this by saying I owned an SVS and to be honest it just was not my can of warms for the money. I sent it back and decided to keep my little Sony SAW-MA20. Well I was at Sears yesterday and say the Sony SAW-MA500 for $50. So i picked it up and I'm really happy with how it sounds for me. I'm using it with Paradigms and a Yamaha receiver and could not be happier. However I'm hearing things about modgepodge, poly-fill, and driver mods on this sub. To be honest since I paid so little for this thing I'm willing to put a little cash into tweaking it up if need be. I found a good site through someone elses recomendation on how to do the polyfill. It included pictures and was easy to follow. I cant find any information on how to perform the other modifications. Can anyone point me in the right direction? Where how and what driver can I put in this thing? How do I do it? Has anyone done it? And how do I do the modgepodge mod?? I don't understand where it is supposed to be applied? Also I'd really like to hear from people who have done any of this and have felt if it was worth the effort! Thanks in advance guys!