RE: i crashed the nexstar
I assume the NEXstar was purchased more than 60 days prior to your unfortunate mishap. If within 60 days of purchase, and you have not soloed - Hobbico will replace the broken NEXstar. Read the warranty section of the instruction book and the sun may shine on you again.
I know this works as my NEXstar suffered a similar fate. I sent the plane, along with a letter from me and my instructor describing what happen, to Hobbico. They relocated all of the electronics and engine into a new fuselage. It took a couple of weeks turnaround and they even included new tail feathers. This warranty replacement is like skydiving without a parachute - you can only do it once.