I would agree that Onc. Tsiku marguerite may be a possibility in comparison to that toaster, but they are very, very similar. I only have a Tsiku in my collection, but in comparing that size to mine, it looks to be about right. I have found that Twinkles are much smaller in pb size and length of the leaves that the pbs produce.
As for particular culture for Twinkle, I am not sure, but I have had nothing but success with my Tsiku in S/H, getting 12-15 hrs of 1600 lumen (~1600fc) lighting that supplements late afternoon sun (in a slightly shaded West window). I fertilize at approximately 50ppm Nitrogen with every watering or if I forget a week, then it just gets water
I also give it a treatment of Maxicrop seaweed supplement for root production and overall growth about once a month or so. My temps are normally between 68-75ish °F. I have gotten lots of lovely spikes and blooms, despite the changes in conditions that it receives when I am home on break from college- one of the easiest orchids I grow! LOVE it!
As for blooming questions- oncidiums will only bloom from new bulbs that are produced after each growing "season" (whenever the new bulb matures). The old bulbs, if unbloomed, will not normally bloom if there are new growths- it has been turned into a storage unit of water and nutrients in case the plant encounters adverse conditions (drought, lack of nutrients, etc.).