Step 5: Create the perfect impression
1: To help with this process, rub a little soapy water onto the cling film you wrapped around your phone - soapy water works as a release agent for sugru preventing stuff from sticking to it :)
2: Gently press the phone into the sugru. Be careful, sugru will still be very soft, so be gentle so as not to deform your brackets too much.
After I completed this I realised that this step is not that necessary, so you could skip it if you liked. Take a look at the Sony Ericsson version in step 8 :)