To answer your question, "Yes" bring a sharp knife as you will have to notch the bottom of the propane cover for the Jack E Up install. I have used it on my last 2 Escapes and plan to use it on the new 21. I did not drill any additional holes because I was not concerned with it being exactly 90 degrees. In fact I purchased another tongue jack and mounted it and put the factory jack in storage. when selling, I replaced the factory jack back to original. It works like a charm and makes for a smooth looking hookup, "jack free". While cutting your cover, do not forget to drill 2 holes and bungee the bottom to prevent freeway wind cover escaping.
"Never in doubt,..... often wrong!"