I said that " if not fatal should exist"... in that if it is not fatal, then they should exist. So if even one exists, then that invalidates the theory that homozygous are fatal.
Personally I never bought that it was fatal, but I do not have enough experience with them to know (just got my first two spider girls this year).
It does not make sense to me that it could not exist in a homozygous form, but again, I have never bred spiders to know that for sure.
Bruce
PS: Did that make sense?