This is an interesting fuel mix option, how long does it take to warm up? When you are starting are do you only need to prime the engine with the standard diesel mix? If so how much prime is needed? Are you using a starter to get it kicked off and do you need to change the compression to start?

One other thought is you might consider adding say 5 - 10% cheap starter fluid (i.e Thrush $1.99 at WalMat) and see if you get any change easyer starting or more (or less) power, would be great if you could give prop & RPM info.