Hi Guys, Will be building a sealed Sonosub; my current box sub has too many sharp corners for my kids to possibly run into. Have 18" sonotube will be a little over 16.5 inches high. Any concerns I need to be aware of regarding this project? I have seen few sealed subs of this type. I suppose my other option would be to make it out of MDF, but that would require more time than I want to spend with my router.