Sol,
The only thing I worry about 'Lilac Time' is that it's a ROTTER. I grow mine in quite a bit of shade to keep it happy. So please watch that in the kids. Have not seen it so far in 'Jabba the Hutt' and the 'Lion King' X 'Jabba' and reciprocal look good too.
Anyway I would not double up on 'Lilac Time' if possible. This is one time I would suggest keep outcrossing rather than line breeding.
Kevin
