Quick update:
Due to Corona Virus my kids had to move out of their dorm room so I acquired one of their mattress toppers for the RTT. I cut a queen sized topper off 6" from the side and the fit was great! I think it's definitely going to add to the level of comfort inside. Most campgrounds are still closed so I have yet to sleep in it. I also bought a telescoping ladder to use with it. The factory ladder was too bulky for me so I opted to get an inexpensive telescoping ladder off of amazon.
Also found out my job is in question due to the virus as well so I cancelled the tire carrier until we get back to normal. For now that's all of the mods I'm willing to do on the build until things stabilize.