I have to agree with your comment on understanding how the systems work in real life, Garry. I won't pretend I understand even a third of it, but I will say that after attempting the Sea Hawk VC, I did improve my knowledge of these systems, and if nothing else really familiarised myself with the cockpit layout in detail, something perhaps I would not have done before. Hence I learned about gyro gunsights and push to talk buttons in throttle levers, courtesy of Peter Mac and others.
So, I would say, while it is daunting, if you've got the willpower, give it a try, Techy! Granted you might not produce something of DM or Rick P quality (I know I certainly didn't!) but at least you will learn how do it, and therefore will improve each time you build one. For me, it helps you to really get to know the aircraft you're working on. Being a massive Canberra fan, I've typically been interested in external, aesthetic looks, paintwork etc. But now as I approach the VC and go through the pilot's notes, it's a joy. You actually start to understand and appreciate the engineering behind the aircraft better, and also what all those fiddly knobs and buttons were all that time!
While I respect the attitude of 'do it right or not at all', it doesn't work for me. If striving for perfection means avoiding ever trying and learning a new skill, you'd never know what you were capable of.