KINGWIN KT-424 Moding Time

[Commander X800]

I have a KINGWIN KT-424 case from King win and want to mod it some more, I say more because I cut out the fan guards as you can see best in rearview pic athttp://www.newegg.com/Product/Product.asp?Item=N82E16811170014 , and then enlarged it(rear hole) to 92mm in size from the standard 80mm hole. At any rate I want to do some more modding (like a 120mm fan on the side and or sound matting) if any one has done these types of mods or better yet has this case feedback would be greatly appreciated.