I have Lavenders too! I love 'em. I have blacks in with mine. Just hatched some black/black split from them. I have more in the 'bator now and I am adding more Lav eggs again tonight. Unfortunately 2 of the hens are broody.
I have been trying for 3 years, a coyote took the hens I had and I have a lav split rumpless huge tufted roo that has been waiting for girls. I finally hatched one pure rumpless lav girl last year and am going to put her with him in a few weeks. I have a clean faced tailed girl that I am not sure if she is lav split, will find out. I was just hoping to try to get a few more girls for him...