I've reached a point where I have the items to open a portal to Ravel Puzzlewell's maze. Before doing so, I just wanted to check if this is the final section of the game. If so and to make the game last as long as possible, I'll do some more side quests first. If not, then I'd like to plough on...

I could have looked up walkthroughs online but don't wish to spoil my progress by seeing something that may occur later in the game.

Thanks - any feedback would be genuinely appreciated.

Nope. You have much left yet to resolve after this scene.
Still, it's a potentially painful scene, so prep decently.

Thank you. I'll get stocked up.

After meeting Ravel you will travel the planes a bit and it will be quite some time before you get back to Sigil.

yes, but some areas are optional

Don't worry, it will be VERY obvious when you reach a point in the game when you cannot return to Sigil or the other planes. So don't metagame too much, and just focus on a satisfying experience.

Yeah, NO, you're like at 40%-50% I think. SAVE!!!!!!!! before Ravel, and TAKE EVERYTHING with you after you finished the Ravel part! I hope you installed the Unfinished Business!

Good news this one excellent wiki pointed out the fact that the guy I needed to talk to is the advocate to get second legacy of nameless one. Got the receipt entered foundry got the portal and everything was going great .......until I finally got to fight ravel for first time ever ( never ever made it this far since game was first out and popular). Got defeated so bad omg!!! Putting together some better strategy for the battle definitely a must. Really gonna take forever though if I want to get the three ultimate weapons of godsman faction...... So expensive!!! Was thinking of getting mazed first cause there are some free items you can pick up by killing few dabus.

finished the game but not with the lawful good ending only was able to get neutral good

The ending does not depend on your alignment, though. The game can reflect what your take on Nameless One is and it's quite good in that regard, especially if you play it for the first time. If you know what is required to have a certain alignment, then you can play around with that and being Lawful Good is no easy task, if you don't know what you should especially avoid doing or saying.

The game basically has just one ending, it's just that there are several interesting options that you can arrive at it.