Before you remove anything can you get a bit of paper or something round where you think the leak is so it stains it and you'll then be sure? I'm self taught and would give anything a go, if I mess it up I would then send it up to Chris at Retro so nothing to lose. If you're not sure get him to fix the leak
I used to be indecisive but now I'm not so sure. When you have eliminated the impossible, whatever remains, however improbable, must be the truth
2004 MG ZT 260SE Pearl Black
1960 MGA Roadster Flame Red