With those wilkinsons kits you only really need to rack once. Wait for the 10 days or so after you've added the finings and rack then. When using finings a good test is to hold a newspaper or similar behind the DJ, as it clears you'll realise you can read more and more of the type and you should be able to read some pretty small type through the DJ by 10 days after adding the finings.
At that stage you can either syphon straight to bottles, or into a sterilised DJ. Most people think that wine ages better in bulk, so the latter is preferable. When you've syphoned it into the new DJ top up to base of neck with boiled water (not too hot though, just water from kettle should be fine as long as it's cooled a bit).