Ian,
Judging by your progress with the layout, I'd say that you really shouldn't have any problems. If you are uncertain about anything, post a question on here or bring the chassis to one of the North East Area Group meetings - there will always be someone there to offer help and advice.
I've got a couple of the 03/04 chassis on order, and have a Farish J94 in the gloat box, so no doubt I'll get around to doing that one in due course.
Andy