I'm of the opinion that, unless it's strictly necessary, it's better to avoid swashplates. I don't know which particular setup used the Rotodyne, but it seems like there's plenty of space for the rotor to tilt. But, to know for sure, it's as easy as finding a good side view of it, drawing a "fuselage mean line" and a rotor path line tilted 9º-12º degrees from that "mean line". If you can then draw another rotor path tilted an extra 10-12º degrees (I'd say not more than 25º overall) and still have a good clearance, then there should be no problems. And those angles should be more than enough. The Rotodyne has a small wing which should provide some lift, thus allowing the rotor tilt angle to be reduced.
Regarding that, the rotor-wing dependance can lend to interesting experimentation. Brainstorming a bit,
- A high-lift wing (= wing provides most lift) would allow you to have a less-tilted back rotor in normal flight -> Less drag -> Somewhat higher velocities and "plane-like" behaviour. You could still allow the rotor to tilt back many degrees, to help with low-speed handling. Anyway, you should always keep the rotor at a minimum angle; else, if you're flying in certain conditions, you could even stop the rotor.
- A low-lift (or nearly 0 lift) wing means the Rotodyne would get most of it's lift from the rotor -> More drag -> Behaviour closer to a "pure" autogiro.
In any case, though, remember to keep the weight really low...Or it will fly like a plane anyway!

It's hard to say this but, that model flies like a drunk hornet. I'm still amazed by how it could survive 2 flights.