How tight does the undersuit need to be? I have a 42" chest and a *cough* 37" waist, so ordered a large Extreme Racing undersuit. However, while it's OK in length, the arms are a little on the baggy side and the legs aren't tight, even though mine aren't exactly skinny. ER say a medium fits 36"-40", so I might be pushing things a bit to go down a size. The suit itself is lovely though, with a two way zip down the front.