Redball8, nice and neat looking corby. I am also having similar changes to my cowl. The yellow has gotten a much deeper color over the past weeks and I thought it might have been from engine heat, but the wheel pants are still the same color as the covering. Also my wheels are about 1/4" smaller than when they were new... it looks like they were running sideways the way the tread has been worn off. could be the alignment is off or maybe too much play between the wheel collars.
In any case , this is one sweet flying airplane. Touch and go's are a blast because the spring in the landing gear makes it hop like a kangaroo, so when you advance the throttle it's already back in the air.

My power is an OS FL-70. , more than enough to give it scale or acrobatic performance. This is a real fun airplane and relaxing to fly. Good luck with yours.

Jerry