I've never had one bloom, but am watching a strange Oddity producing a sort-of spike with branches. I'm thinking at this point that its just some weird offsets being produced, but hoping its going to flower so I can try my hand on some crosses. I wasn't sure that Grigg's ever flowered until I saw your pics. (btw, would like to see more pics, some showing some different perspectives if you can - its a really rare event!)
Also, do you know that you can store most pollen in the refrigerator for a few weeks, so you may want to preserve some of it to get max opportunity for crosses.
Still haven't seen an Oddity flower though.