I looked at the official Quota hose, it was something like $75?! Ended up just keeping the old one. For my back of motor leak fix, seems the biggest leaks for me were the gasket where the crankcase vent hose attached to the motor (inside the bell housing) and the bottom two bolts for the flange (that supports the back of the crank). Those bottom two bolts are threaded all the way thru into the crankcase, so I guess as pressure builds up oil makes it way by the threads somehow. My cam plug cover was not leaking (but I put JB Weld on it anyway) and it did not look like my flange gasket or rear main seal was leaking but I replaced them anyway. Getting the rear main seal out without pulling the flange seems like it would be very hard. Pulling the flange out mean you can easily get to the rear main seal. I read that it is possible to put the rear main seal in too far, so be careful with that if you replace it. Good luck!