I used to run the CRC front end on my BMI with the long upper arms. For me the car felt a whole lot smoother this way and I found it much easier to drive.

However I have switched to the new BMI front end and really like it a lot. When I had the car running good it was very smooth...I just need more time in 1/12th in general to be able to dial in quick enough for races like the IIC.