A8.5 and heli's - Cobra model?

[Cobra]

I notice the cobra heli model is not packed in the alpha 8.5 install... Is this deliberate or an oversight? I really like that model for heli practice, as it's a little more stable than the smaller models I've tried. I notice that the beta 7 cobra model seems to work in alpha 8.5 if you copy it out of the model directory prior to an uninstall. Is there anything I should look out for if running a beta 7 model on alpha 8.5?

Thanks,
Kevin