I'm looking at the 2014 or 2015 Spark and wondered if the trailers are fairly universal? Can you buy a used trailer and be pretty good with minor adjustments, or do you have to have all the right dimensions? Can anyone tell me the dimensions for the spark? Is it worth going through the trouble of buying a used one, it seems like used you can get for under $400, whereas the dealer is going to add on another $1200 for the trailer, which is a heck of a savings to me. Thanks for the advice.