Thanks for the confidence vote, but I only know enough to get me in trouble, lol... but I do know Lavender and Silkies...
Couple of issues there... it's more successful to breed a bantam roo over a standard hen as the chick will usually grow too big for a bantam egg... also, most white (especially in Silkies) is recessive so breeding other colors to it is very unpredictable... you also only want to use black to mix in with Lavender as it breeds in and out well without leakage issues or surprise colors popping up... and Lavender color will only express if 2 copies are present in the bird... this is why I only use black splits in breeding my Lavs as the splits are carrying 1 copy of Lav but show black so offspring have 50/50 chance of being black split again or Lavender...
Also, Silkie feathers are always lost in a cross, the chick will have regular smooth feathers and you'd have to breed back to Silkie for the next generation to start getting the Silkie type feathering back...