Hey, if your not going to help why bother commenting mate? I realise this was an old thread but my god are people judgemental, the man asks for help and some of you just take the piss, 20 cm is clearly achieveable, is it gonna be difficult? Yes, even remotely close to impossible? No. Its going to take alot of effort and patients along with a good doctor and money but you will be able to, it might be too late but keep your head up high and just have hope man.