I have done just about all of the work you can do on a sonotube sub without having the driver. If and when the Tempest ever shows up I will be done in a few short hours. Basically it is an Adire Alignment sub. So Would you or wouldn't you line it/stuff it and why? My preference would be to not line it, for ease of build and so I don't have to worry about the lining glue ever letting go. I am already planning a few more bigger sub projects in the near future, this one is just for fun.