This is an issue that the t/d scales don't cover, and we have to accept! Here is another example of its shortcomings (that i feel is ok, since we are mainly geocaching not climbing, diving or rafting)
In climbing we have grades, like whitewater kayaking/rafting has grades, and ski-slopes have grades. A cache plased on top of a grade 8 climbing route or if its placed on top of a grade 4 climbing route (or on the international space-station) it needs SPECIAL EQUIPMENT so, its a D5 (ref. guidelines) if i need to seek for a logshaped nano stashed in a hole in the wallaaa at the top or if have a sign saying "cache is here" in my face is what makes one a T1 and the other a T5
Here is you T5 nano btw. find somewhere to climb for it an put an magnetic nano on an anchor at the top.. -> would still probably be a D1 thou since it would be easy to spot)
