Don't let your excitement cloud your better judgement.
Don't sign until everything works. This is a very busy time for RV dealers. Once you have paid ( signed) for the RV, you loose your leverage and it could sit on the dealers lot for months for the warranty repairs. If it is a simple fix you can do then OK, if it is a major warranty fix tell them you will come back and sign paperwork when it is completed.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 65W solar panels