I've used many c5 tab add-ons. This kind of sub-navigation is generally useful. Whale Sky Tabs is excellent, many details are well thought out. I heartily recommend this add-on, and it is at a great price.

Thanks their are many options and settings you can play with, and the support is excellent for me.
With little help, can now load set-tab from anchor URL.

Thanks
Carl

This tabs add-on has got to be one of the best and most functional I have seen. To top that off, it is easier to work with than other options, no need to make sure you add cells and everything in a certain order, just build your stacks and the rest is click and go. The absolute only thing I would ever ask, is if it was possible to fully customize the tabs themselves. You already add much more to that than other options, but that would be it. I commend you on your work and will look for your add-ons first, when I need something, in the future.