Dave , I've watched two of the Slimlines installed. Don't think it would be too hard 'secially since the coach is alreay wired for it. I had mine put up front so I have alot of cable on the roof but its all clamped down and sealed so no problem. You just want to use lots of sealer.
John & Kay
2018 GMC Denali 3500 DRW Crewcab
2013 Redwood 36RL Full paint D/W W/D 2 A/C's and all the other stuff.