hi yok. i was one of the earlier guys on the xxl2e. i am going to use the red 1515b out of my xxl2e for the motor. for the esc i plan to use a mm2 as it has adjustable voltage on the bec. the sidewinder 8 is in my erevo where it is a better fit. just guessing that is the one that you are planning on using. might want to use an external bec. i have been all over beating truggies and buggies lately and those 2200 motors are really good for bashing.
per putting it together, you will be totally fine the manual is very good. not quite as good as an xray manual but better than the 8ight/8ight - t. if you have any questions the electric off road sections have a bunch of very helpful and exceedingly knowledgable people and it tends to be better populated. i am very thankful for the help i have gotten here but sometimes have to be a little patient as it seems like there are only like 2 dozen consistent posters in this forum whereas the electric offroad seems like around 100.
having blown a bunch of money on erevos/axials i am sold on the race pedigree for bashers.