Hello Rusty!  Generally I try to avoid sharing my experiences / opinions because there are so many variables between models, environments, equipment and even modelers themselves but I can say "give it a try", you may be pleasantly surprised.  A few years ago and even until now, I have been building a Claus Maikis model called the Big Tiger.  Honestly I endorse the design without question.  One of mine uses an OS 40FP with a 2-blade 11x6 and two of them used Fox 40's r/c, with the throttles locked open, and Master Airscrew 10x7 props with greater than expected performance.  Recently, because I accidentally broke one of the props and subsequently I mounted an APC 11x6 four blade prop.  I was pleasantly surprised and have not regretted the change.  Now, that's my experience, for what it's worth.  So, in conclusion, my suggestion is try it  !!

shtterman on Ebay will have what you need.Randy Smith our moderator here will have them also.
Mike

It obviously needs to have a shorter bottom fin and tail wire so it can get enough angle of attack to take off.  Also, once in the air, the rear grommet kept coming out and the rear leadout sliding back, messing up the controls.  I made the adjustable lead-out slot pretty long and can see now that it doesn't need to be, so I'll fix it so the grommet won't come out.  I think I'll leave the fin and wire alone as I sort of like the Rhode Island Chicken take-off.

These flights didn't have the third line attached.  Next time out I'll hook that up and see if it will be a disaster or not trying to saber-dance.

I love the eyes!  Especially with the motor running.

My flying buddies obviously do not think its a Walker Cup contender.  Oh well.

Good wood props…
Some were mounted…..
Some are balanced….Ward was a terrific balancer.
Master Airscrew 10 X 6 NEW (4)
Master Airscrew 9 X 6 NEW (2)
Started as 11 X 4 W, mounted, 3.75 indicated pitch
12 X 4 Zinger…mounted, balanced
12 X 4 Pro Zinger….new…balanced (2)
11 X 5 Rev Up ….mounted, balanced (2)
11 X 4 Zinger Pro…mounted and balanced
10 X 6 Rev Up….mounted (3)
11 X 4 Rev Up Pro…mounted
10 X 6 Top Flite  …. Mounted (2)
11 X 5, cut to 10.5 X 5 Rev Up…..balanced (2)
11 X 4 Top Flite Super M….mounted
10 X 5 Rev Up…New
10 X 6 W Rev Up Pro, balanced, new
11 X 4 Rev Up balanced and 3.8 pitch…new
10 X 6 Master Airscrew ….mounted (2)
11 X 5 W Rev Up Pro mounted
10 X 4 Rev Up pitched at 3.5 balanced, mounted

9 X 5 Zinger
12 X 4 RC Power Prop…new
12 X 4 RC Power Prop….mounted
14 X ? Top Flite mounted
11 X 6 Twister….New
12 X 6 cut to 11.25 Rev Up 4 Cycle….mounted and balanced
10 X 6.5 Rev Up….mounted
10 X 8 Master Airscrew NEW
10 X 6 Top Flite Super M….mounted (2)
9 X 6 Rev-Up…balanced and mounted
10 X 7 Top Flite Super M….mounted
9 X 6 Top Flite…..mounted
11 X 4 Nice….new and balanced
11 X 4 Power Point, 3.75 pitch…mounter and balanced
11 X 4.5 balanced…mounted
Shipped CONUS
Thanks

I've got a 3 blade prop on my Brodak P-40 ARF,  although electric.  If nothing else it looks so much better than a 2 blade.  good luck.