I dont know about eating the type rs because IF DONE RIGHT the type r is a mean a$$ woofers. If you wanted somthing insanse then you should have gotten an hd3-12 and 2500rms.
looks like i regret buying these lol back 2 fed ex same day i get lol my type r box was small only like 2.8 cubic feet total and i was happy with it this box is going to be almost double with a box that i built instead of ashop
you can play around with it, thats normally when you find what you want, I did alot of that today myself just to bring my score up. You could try somthing like 3cubes after displacement, but normally with little power you want a bigger box.