finally bought some good material and gonna build a legit car trailer once and for all!! My question is:? do you put a slight bow in the trailer frame like 18 wheeler trailers have so when you're loaded you're sitting flat? I bought 2x4x1/4" tubing for frame, front and back pieces, and got 4x4x1/4" for the braces in between. Tongue will be same 2x4 since i got 4 20ft sticks. Just trying to figure out if you're supposed to keep it perfectly level or put a very slight bow in it...might be overthinking it but doesn't hurt to ask since I'm building one for real this time lol, no more camper trailers haha. thanks.