To elaborate on Doc's short form of this proposal:

The old traditional AMA Fast Combat is essentially dead. The last couple years, a handful of guys showed up to keep the ghost alive at two contests, The Nats and The Bladder Grabber. These are older flyers using up their stock of old equipment which is no longer available. In 2010 only 14 people entered this event.  The future looks like nothing but further deteroration

In contrast, F2D is alive and well and there are numerous contests with plenty of entries. Winning equipment (at a cost) is available via a single visit to a web site. IN the USA and Canada, over 100 flyers are active in F2D.

Fast Combat, which requires only one model per match and ends with a kill (not always a collision or line tangle), could be fun to fly with no additional equipment.  

So same engine as current F2d?  
same useless muffler?
same intake restrictor?
same 10%-20% caster rule on fuel?  

Same lines?

If FAI changes the engine requirements, what happens?  I would bet the exhaust exit size will shrink soon.

Good f2d guys get new engines almost every year for an 100 RPM.  I have several cast offs that make great speed limit motors but won't pull like a new fora.    

I get it, I understand the concept.   

I was just asking, how far the statement "using F2d equipment went".   

Agreed, I think.

As I wrote it, you could use either an off-the-shelf Viko, or try to design something better.  Due to the much lower mortality rate in Fast, it might spawn the design of "a few good planes".   Then, these improved designs might make their way into F2D and improve the breed.  Maybe the 1986 Doroshenko airframe could use some new tinking.