Carrell, what you're describing is known as a cowl ring, which can be a good solution with kit built or scratch built models, and keeps a clean appearance for scale models, but may be too complicated for many ARF buyers. It's not always easy getting the blindnuts correctly spaced on the firewall interior. I've never seen a laser cut cowl ring supplied with an ARF, but then again high end scale ARFs are not my cup of tea.