Good idea, crossed my mind too - just with a different name Y3_CB1.9.dm
So far We have 4 Ayes, 0 nays and 2 neutrals.
It looks like we're going the CB1.9 direction. I'll wait another day to give enough time for the players who want to vote.
After that, if we go 1.9, I'll make a specific copy to our game as llama has kindly suggested. In this case, you will need to redo and resend your pretenders with that mod.