If you look at this link from the Teleskop Express website it shows you which adaptors are required to fit a 2" focuser:
http://www.teleskop-express.de/shop/...e-TCE0100.html
For 2" connection you need the both optional adapters 4ATDB0 und 5102A1.
I bought my Tak scope from them and the adaptors, and it works fine on my
RC08.
BTW if you buy them from Teleskop Express you can avoid the Euro VAT of 19%
as it will be exported to Australia. Current cost works out to 239 Euro or $371 AUD then add about $36 for shipping.