What tension for aux belt?

[daddycool]

i'm doing my aux belt tomorrow, what sort of tension should i have on the belt, ie one inch of flex along the longest part?

i've just removed pas and have got a shorter belt, but not 100% on what size belt i need yet

 

[sideways danny]

tighter than you think. ie, when you think it's about right, give it a little bit more.

 

[daddycool]

started squealing this morning, presume it just needs a re-tighten?