T sling sexing?

[HitokiriSessha]

This is going to come off as quite a newbie question, however I do need to know this information:

Is it possible to determine gender of a tarantula while it is a spiderling?

If not, as i suspect, at what age is it normally easy to sex Tarantula spiderlings?

[Chris Sainsbury]

In a word ,Yes.In most species you can very accurately determin the sex of a tarantula from the 6th moult (the first moult being in the eggsac).In some specs this can even be done with the 4th moult.
For such an early moulted skin you will most likely need to have a microscope to do this though!