This is a straightforward tree climb, and the unusual hide is easily visible from the ground, hence the D1 rating. The high T rating is because some means of getting to the cache will most likely be be required, although the very nimble amongst you may be able to climb it without. For the record, I used a caving ladder, and an extendable ladder should be sufficient for those without rope climbing equipment.
Please note that I cannot accept responsibility for any injury occurred as a result of attempting this cache. Each person needs to make their own assessment of the situation based upon their own capabilities.