I've only cooked once with the membrane on.. forgot to remove it from one rack. I cooked it/them in the 008 and didn't find the membrane to be tough.. maybe 'cause of the moistness of that cooker.. I'd definitely agree if they were cooked on a logburner
Before I learned about the membrane removal, I did a couple of racks on my Weber kettle.. offset cook with aluminum pack of chips.. and it was pretty stiff
Taste was pretty dern good tho.