Hi I bought a 2008 Fleetwood E2 and in addition to a plethora of other issues, the crank starts to bind after lifting the top about 6-10 inches. It works, but very bindy and seems to slip a little as it continues to raise. By the time it reaches the top it’s even harder to crank. I’ve looked at the wiffle tree and opened up the crank assembly but I’m not sure what possible wear to look for, or what else could be causing this. Any input would be great. Thank you!