Stick , I agree with these guys , I dont know why if you are so committed to building that you hang in an ARF post unless your like an attourney waiting at the scene of an crash waiting to make your case lol .
Every post your in is a battle while its a shame because when you do stick to the building side you do have a ton to add .
I am going to stop with the fact that just like ARFs , kits have dwindled because most need just as much work and experience as do ARFs , I have build Picas , and Platts kits that look like a box of wood , would have been better off scratch building a plane . ALso plans are wrong , wood grain going the wrong way creating a major weak spot in high stress areas.

The best part of the Hanger 9P40 is that its sold by Horizon , one of the best companys in this industry . If you box your plane up , spend the $25 bucks to ups it back , if they see a manufacturing defect that may have created your crash they usually will make good .
As far as knowing about what to do in this case , well its a warbird and they are never ever ever for pilots who dont know what to check and to look for redundancy .
I have a funny post going under warbirds about having a bad day and guess what every problem I encountered was of my own fault .WHen flying any rc plane you need redundancy -in everything ,
Example -balance the prop and spinner , then add locktight to your engine bolts , add plumbers tape and z42 to your muffler sleeves and or muffler extensions , all set screws , add jb-weld to all easy links and make your adjustments at the clevis end , advoid medal to medal contact ,
glass firewalls & retract installs . Run your engine at home with the cowl off , look for vibration and its effects before you fly even from that prop that you think you balanced .
I can tell you that many will go to there shops , buy a warbird and it has nothing to do with building it has to do with experience in RC period that will make or break your success .
Even when adding weight for CG , so many add before they move anything in the plane or they assemble a short nose warbird before moveing servos ahead of the CG only to add 12 to 30 oz later when its to late .
So my point is who cares if you build or buy arfs , the best thing to do is ASK before you fly , be redundant , be a pain in the a...... because you and your plane are worth it and we as an rc community want your to succeed and have fun regardless of weither you build it , arf it imagined it [8D]