On Jan 23, 5:52*pm, mark wrote:
On Jan 23, 8:00*pm, whit3rd wrote:

...* It's best
to keep the smallest of the two pulleys as fully wrapped
as possible, you can achieve that by putting the tensioner
near the smaller of the two.

So if they are the same size would the middle be best?

Not exactly the middle, but a few inches one side or the other (two
adjacent same-length belt segments can resonate IF they are
matched, there's less vibration issue if they're mismatched).