Just to clarify - I'm in Port Hedland, warmth is not lacking here! So I won't be using black plastic as a cover because I'll be trying not to cook the new roots (should they grace me with their presence); It MAY be necessary in colder climates but you'll have to run your own experiment. I am, however, considering al-foil as a heat reflective ... the ambient temps here are currently in the mid to high 30s and this particular tree is only getting morning sun (till about 10:30-11ish).
Thank you for your suggestions, especially the link, Luke 308. They look like a great idea and I have also seen another version that look just like a Black bubble that clamp on in a similar way. The process is the same, plastic bag, old pots or these specialised cloning systems... As I am practicing this, i'll keep to the low cost version for now. There is plenty of posts here that show how you can do it with just an ordinary garden pot from a nursery so have a dig around... Next to growing your own seeds, this is a great deal of fun!
only 5 days in ...
Well done!
I put a few stones as a top layer to keep some moisture in. I keep it in full sun and water it everyday.... The real soil is down there 
Will do a "bigger" picture a little later today... 
