I've been told that one can use spacers to widen the rear track of a 348 Challenge. The purpose would be to bring it to the specs of the Speciale and the Spider, which have a widened rear track for increased stability and better handling. Here are my questions: How complicated is this process? Can the Ferrari dealer do it? Are there any safety issues involved? What happens when you need a wheel alignment? I'm sorry, but I just don't know what "spacers" are.