RC Flying Head,

Since you've already installed the firewall the only way yo can change the right and downthrust is by using washers. Since .100 inch of washers on the right side seems to shift the engine mount back left try this combination of washers under the mount.

When viewing from the front of the aircraft.

Top Left 1 washer, Top Right 0 washers
Bottom Left 3 washers, Bottom Right 2 washers.

Since you already established that a single washer under each right engine mmount boss shifted your right thrust to the "That looks about Right" point, when you add to the left side bottom you must add the smae number to the right bottom.

I reset my firewall during assembly and as I posted earlier establiushed 2 degrees down and 1.5 degrees of right thrust as my starting points.

I wish I had spent more time working on my RB, we've had perfect weather in Houston Friday and yesterday, with a repeat for today. Looks like we'll have mid to high 70's, CAVU with a light breeze. We've got a big high pressure area over the top of us right now. I did fly my beater trainer plane, a Lion Models ARF Spitfire with a Saito 80.

Rich