Here is a another question to throw in for tandem/ tripple axles
What about independent suspension? I don't think the axles are linked together and this is coming out as an option on some trailers now. To me it seems like it would be really critical to be level with independent supension.
Also if brakes were adjusted equally and the weight is rear biased the front axle of the trailer would lock up before the rear. The opposite would happen if the weight was front biased
