yep, love the Biela props too, and that is what the new DA 100 will be swinging on the soon to arrive (hopefully) Composite ARF Yak 2.6M.
Not only do they perform nice, but they also look soooo cool.
Here is my 35% Carden Cap (Sold) and GP Christen Eagle with Bielas. (27x10 and 22x10 respectively)