Limb Walking - that old chestnut. (Oak in this case!)

[Fredward]

Basically redirecting SRT is the same but the rope isn't moving so theres no friction, eliminating the need for two carabiners. Therefore you could chuck in 4 redirects or more if you wanted to, which will spread your weight and allow you to get right to the tip of the branch.

[Paul Cleaver]

that's a swearing job for me - if you have the chance of another well placed limb, use a 2nd anchor point - but make sure your rope is long enough.

[wood cutter]

You want to worry when you think that if the branch your on snapped you would hit the floor before the tree as your that far out!

 

Not a nice though but one that must be considered. Just brake it nice and steady with as much weight on your main line as previously stated.