When I toured the Flagstaff plant, I asked how they knew which units got ladders and which ones did not. I was told that ALL Flagstaff units left the plant with blocking for either right or left mount. Not possible to add it behind the end cap from the outside! Bet a check with the plant to see if this is true with your model. I checked wth my dealer later and was told he does not order factory mounted ladders was to prevent people from Climbing units on sales lot. Go figure.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned