Hello Edds,
i did a lot of crossings with Tiger Stripe in the last years. I cross every flower with a lot of different other chamaecereus-hybrids, because the flowers pollinated with only one parent rarely form seeds.
Crossings with luisramirezii never worked.
If i use Tiger Stripe as a father it´s similar. They work maybe 50% of the time. On the first day there is hardly any pollen, on the second day its a bit more. The seeds are also not very vital, some crossings only produce seedlings without chlorophyll and die away.
BUT: If the crossings work, and the seeds are vital, the outcome is awesome!
These are some seedlings that flowered this year: