This comes up a lot both for our Local customers, and we get a lot of questions about this from afar.
The old saying a picture is worth a thousand words, I think a video with a little sound is worth many more. I did make a mistake about the green aftermarket idlers we see in many of the online kits having double bearings, that is actually not correct, they are just a single bearing idler, which is really not the best choice you can make . It only costs a few dollars additional to get the updated component.
Thanks for reading and watching