If I remember correctly, x splendiana is (smilesii x maxima), not a mirabilis cross.
I fear I must argue then. Neither mirabilis nor kampotiana/smilesii would contribute the wide peristome or prominent mottling that this hybrid has, as from all pics I've seen, none of those parents has such characters. And this is the first time I have seen this plant referred to as being such a cross, every other thread I've seen where parentage has been discussed has seemed to agree maxima is at least one parent.
Haha, now I'm totally confused. This is one of the many reasons that hybrids frustrate me. Looks like I'm going to have to send out some emails.
Anyway, thanks to all who have pledged to contribute pollen to this plant........whatever it may really be.