Thank you Wingster and Jerry,

I am going to take your suggestion and put together the back support, and yes, I have seen some pictures of the nose section got "exploded" due to some things went wrong, and hope to avoid that by supporting the rear section of the motor.

Meanwhile, based on the result Jerry has with his Abbra, I am going to try out the A60-24S in my new project as well, since my plane will be very close to 11 pounds if not at 11, and I think the 22S might not be able to swing larger props like 24S can. I should know in a couple weeks.

Kevin