When you buy a kit, DNA will go though a lot of the procedure with you, and they are always on the end of the phone. However DNA are looking to sell the moulds for the 360 so when you're ready they may not be doing the 360 anymore.
but there is always the 430
. DNA have done a 6 part fitting guide for the 430 that is on You Tube, plus there are a good few build diaries on here to help with the 430 build.