Blew out back RH window with my camper tonight,,,, Confused

I have the BW slider and in one season have used it in two campgrounds because of tight spaces-- besides practice at home. Ours is the short box and without the slider we get way to close on a 80 or 90 degree turn. But I'm a tight guy and have no problem stopping and pulling the lever to slide if needed. Our TH is only 32' so not quite a problem on tight turns like OP's though. We looked long and hard at the Anderson, and still like what it offers. best of luck,