Some guys who run control line using the LA46S do port timing modifications to them and squeeze out quite a bit more power. Try that maybe?
My idea I have for my spare LA's is to build some 30's FF models that were set up for Brown Junior motors. Not a particularily high-power application, and the engine is pretty understressed. That or a twin since I think the two spares I have are both 40s and they're pretty reliable motors anyhow.
There is not
last January it was -11 one day and I decided to do exactly that, and also fly because why not. The 46LA fired right up with no fuss at all. The Saito 56 I brought along protested a little but I set it next to the exhaust on my car for a few minutes to warm up and that seemed to make it much happier. Can't say the same about my fingers, they pretty much had no feeling after a barely 2 minute flight
I wish flying in gloves wasn't so annoying...
I've heard another method to deal with fussy motors in cold is to mix up a bottle of 1 part gasoline to 2 parts fuel and squirt a little down the carb throat, it'll run like crap for the first few seconds but that should be long enough to get it warm and then just do a hot restart from there.