I will be purchasing a new truck once I decide on the fifth wheel trailer I will be purchasing. I want to have the truck bed spray lined with Line-X. Do I get the bed spray lined BEFORE I have the Reese hitch installed or do I have the hitch installed first? It may not be an issue since I plan on using the Reese Signature series where the rails will be under the truck bed. However, if there is some reason why I should not have it done until after the hitch is installed I would rather find out now and not when it is too late.