Hi Ben
This is awesome work!
I really like the customization to pop out the marker symbol on the hover event in the tab.
I'm replying here in addition to the email I sent you yesterday so that people on the forums can see some feedback from us. Thanks for sending us the sets of numbered marker symbols. As you noticed, the Shortlist wasn't designed to handle this many points in one tab and there's some enhancement we could do on our end during the initial load to make it clearer to the user that the map is loading.
Like I mentioned in my email, in the current version of the Shortlist template download, we made an enhancement so that shortlists with only one tab of places no longer have a tab 'handle' control at the top of the tab at all, which gives one-tab shortlists a cleaner look. But it may not be worth downloading that new version again just to get that enhancement because you are actually using the tab handle control anyway to convey some info to the user.
Rupert