I'm going with the "St Louis rules" with the exception of the 5% fuel.  I'm still providing 10% as in all other events.

I will enforce the other two new rules, stock displacement and no RV's.   It is a great honor to have a rules change dedicated to you.  You should display your RV Fox 35 as a trophy.

I'll have to take a look.  Did they ban pipes too?

I think stock displacement was good idea.  Otherwise you could make the engine into a 46.

The RV rule was something of overkilling a non-issue.  RV's were briefly made as a fix to SuperTigre's inability to make a front rotor crankshaft that would hold together in a pan rat with  40% nitro.  Once Henry Nelson proved that you can get more power than you need from a front intake, RV's went the way of dial phones. 

Maybe somebody can post a copy of the latest & greatest rules to refresh our memory.

 The rules say "that the use of ORIGINAL Fox 35 mufflers is permitted" so it looks like drilling out or cutting the Fox muffler would be legal. That might work better than the mini pipe! 
Al

Motorman
it is NOT Sportsman Fox, it IS Sportsman Stunt Speed.

ANY plain bearing side port motor can be used EXCEPT ST, JOHNSON and ANY OTHER FOX motor EXCEPT the Stunt 35.

mufflers are not required.

Carl

SPORTSMAN STUNT SPEED
This is a participation event created as an alternative to Fox 35 Stunt Speed which is an engine builders’
event. The intent is to provide an event that can be flown with stock engines and existing airframes. As
such, contestants who have exceeded 90 MPH in Fox 35 Speed or who enter Fox 35 Steed at this
contest are excluded.
Airframes – This event allows on sport planes with built up or foam airfoil wings and the general
configuration of a sport plane and are capable of doing basic aerobatics such as a lazy eight of reverse
wingover. The airplane must ROG from a fixed landing gear.
Engines - Only stock plain bearing baffled-piston engines of the nominal 35 size are allowed. Since
venture size data for the whole world of engines is unavailable, any fixed venturi is permitted. The
suction fuel requirement effectively limits choke area. All Johnson and Supertigre engines and Foxes
other than the 35 Stunt are excluded.

Not all of us Bob.

  everyone missed the point of the R.R. engine it was to get a solid crank that wouldn't break at 18,000RPM

I agree.  SuperTiger & OS couldn't make a front door work.  But Henry Nelson did.  Now the RV has gone the way of dial phones crank windows.
It was useless for the St Louis club to ban them.  But they did.