I've just realised that you guys might not have seen the Excelleron 50. The model is relatively new and it seems that I have been doing some product testing without knowing it.

And yes the rib slots in the forward spar would reduce the strength in bending as well.

I'd be interested what the horizontal stab internals in the Excelleron 90 are like, noting that this model seems to be very popular.

I'd like to try the Excelleron 90, but I guess T've been tainted somewhat with the build quality of the 50 version.

Woxman