Today I made my first venture into DIY audio. I constructed an 85 L vented off of the Adire plans. It took about 3 hours to put together, glue, and screw. Its rock solid. Now a couple questions 1) My wife, has said that she may actually prefer a front firing driver, Instead of using this sub as directed in a down firing variation, could I finish it off, put spikes on it, lay it on its side and have a front firing sub? 2) Will I need polyfill or foam? If so what is the best choice and how much do I need. Will I need to put it on the bracing or just the outside walls of the cabinet. 3) When I get and install the amp (250 watt) will the space the amp takes up effect the volume of the cabinet negatively? If so could I double up the MDF to help this? 4) Shiva is a DVC driver. To wire for a 4 ohm amp I must parralel. This means I have to wire from my amp to one set of terminals, out that set of terminal to the other set of terminals yes? What kind of terminals are on a Shiva and how do I wire them? Any other tips in relation to this cabinet are appreciated.