I can't believe you got clobbered by customs! That is bad luck. Mine came through with no problems.

Ok, lets say you collect it on Monday and get started.
I'm around all day waiting for stock delivery.
So, if necessary you can contact me at every dab of glue & snip of hair.
We'll go through it stage by stage.

Your list looks pretty comprehensive and you have enough to get you through.
I don't know whether to suggest a box of hair dye that is one shade darker than your own natural hair.
My fear is that if your piece is slightly the wrong shade, the rest is pointless.
If you have some dye, you can cover the lot so its all one colour.
A semi permanent that covers grey would be your best bet.
Also, if you have a fan handy, that can help, just in case you get in to panic mode!

Between now & Monday you need to make your template and get that sorted.
Once you have the right shape, you'll be able to cut the piece and get started.

I'll PM you my mobile number and rather like an airplane disaster movie, I'll be ground control and you'll be the passenger attempting to land the plane!
Lets hope this one has a happy ending & together we avoid the crash & burn!

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PS. TWEEZERS!
Add that to your list too.