2391 is slightly intergrated into ur 2330, reccommend u do the 2330 first for then u will have more of an idea to go into depth with ur 2391 which is highly sought after
i am also in your boots brez in the north west essex area. just about to take my 2330 206 on tuesday. hopefully with that under my belt it will make life easier.
would like to thank all that people who post advise links they have been very helpful