Three Questions... 1.) If I buy a trailer with only one set of brakes. and I want to make the other axle have brakes. Is this all I need? http://www.etrailerpart.com/mywebs/myweb/catalog/k923134_2963056.htm 2.) How hard is it to wire to correspond with the other axle that has brakes? 3.) If I buy a trailer with no brakes on the axles... Can I buy to sets of the brakes in the link above? And how hard are they to wire up? 4.) Do you have to have a battery and break away switch in-order for brakes to work when hooked up via 7-pin. I know your must have a break away switch in Mi, im just wondering. And how much are they... Dang that was 4... Sorry for the questions guys. Im not all that fimuliar with trailers, so im trying to see what I can do. Reason being, im thinking about just buying 2 16footers from a local guy who only used them for 2 years. They are in good shape and all they need is some paint. But one of em only has brakes on one axel, and the other has none. IMO brakes are a MUST. Again, sorry if these questions are not the brightest, just trying to gain some more info. Thanks!