I was initially nervous to drill holes in too, but after really checking things out, doing some mods and looking at the holes jayco has drilled, I see no difference in the holes I put in over the holes they've made. The only difference, I'll be a little more generous with the sealant I use.
2013 White Hawk 28 DSBH
2011 Jay Feather X23J (traded-in)
2011 Ford F-150 XLT w/towing package
RoadMaster Active Suspension
Reese Trunnion Bar WDH w/Dual Cam sway control