Not sure how yours ended-up almost one pound more than mine-- did you weigh everything while still in the plastic bags? I am pretty confident that I can keep mine under 8lbs (having weighed my engine and electronics).

I did get the YS mounted last night and, well, I was partially right. I can mount the engine so that the cylinder does not protrude from the side of the cowl and the muffler still exits on the bottom. However, because of the curved shape of the lower front of the cowl, the cylinder-head will hit this area (and require cutting). It shouldn't be too bad, and again my goal was just to make attachment/removal of the cowl painless-- not avoid cutting holes in it. Anyway, I'll post some pictures when I get the cowling trimmed correctly.

One other note for those currently assembling the plane... if you are mounting your servos in the rear take advantage of the fact that the servo-cutouts are close to the horizontal stab. You should be able to position the stab and then glue it via these cutouts (CA would be real easy, epoxy would require a bit more work). Makes installation very clean and you can avoid excess glue.