thanks for that quick reply.
I agree with you skywalker.
To be more specific,i have the dauntless groundschool atp software.
I can select precisely which subject in particular i want to practise.
I think items such as aircraft system,instrumentation,weight and balance,aerodynamics,engines and systems might be the one with the least differences technically.
am a bit sceptical...but i'll go for it.It's too tempting....cheers!