Geocaching - T5 use different icons

One of the reasons Twonav still has some attraction for me on Android is (beside the dashboard) the ability to use my own icons for geocaching.

In Germany caches using the T5 rating are becoming quite popular. Since I`m not the type of cacher who is planning everything before starting, I was looking for a possibility to show my caches of this rating on the map (I rather go for them instead of avoiding them).

I made my own iconset to differentiate beetween T5 caches and not T5 caches and caches with lots of favpoints/good GCVOTE rating. With GSAK I export my waypoints and on the map its easy to differentiate.

Here are some examples:

I saw that a topic exists regarding the integration of favpoints system into Locus. Since groundspeak has this stupid barrier that allows only to download favpoints via Api, I understand that an implementation of some rating could be quite tricky. It even depends on the user preferences (specific amount of fafpoints|favpoints/month|GCVOTE-rating). But showing T5 caches should be much easier.