I have read lots of lair threads and looked at some pics and I'm ... confused

I've seen more than one dragon say that it's best to make floors have multi-access routes, so you could theoretically rearrange one floor without deconning the whole lair. Having done and redone (and redone) my lair several times, I'd love to set up something like this.

I have a 5x5x6 lair on Blight. Can someone give me some advice on how to set up this multi-access? Is it something as simple as having a series of spirals that connect all the way to the bottom, with an access opening for each floor?

Has someone got a similar sized lair that they have done this in that I could look at? I've played around with graph paper and the Excel spreadsheet in other threads and I just can't get a layout that works for me