I just ordered the DE hive mod-kit for me to try next year, ill make some more myself before the year starts and ill report back here if anyone want to know how the mod-kit performs.

My experience has been that rotating the hive and adding the ventilation box have had the biggest improvements. These are the two aspects that I have adopted for my hives.
I think the bigger, ventilated top cover is not worth the extra effort, and I still perfer a screened bottom board.