RVs are for modding, not camping. :B And the more complex, time consuming and costly, the better - that is unless you ask DW. :(
After owning 3 TTs now and seeing how the factories throw these things together, I seriously doubt even the most inept of DIYers can mess something up. It's like anything a person does to a TT is an improvement...
I was at our dealer yesterday and although our TT is only 13 months old on a 2 year warranty, they are refusing to do any more warranty work because of all the mods I've done. Utterly ridiculous and just an excuse. They wouldn't even replace a shower door handle that fell off. Time to phone the factory. :M