Can't help you Rick,
I am still learning. Wish I knew. I was using a artist paint brush and blindly wipping the inside and also with some other Huernia blooming at the same time. Nothing. Didn't see anything like pollen.
Stush

The plot thickens!

I found the article below, which is highly technical by necessity, and tells why the regular paint brush approach won't work. I knew there was a 'key and lock' system regulating pollination, but this is an amazing example of evolution.
I've been using a cat whisker to pollinate most of the really tiny (non-stapeliad flowers). Maybe the fine end of a whisker would work as well as an insect leg? The whiskers, like many hairs and quills, are 'directional', I.e. much easier to drag in one direction than the reverse, and perhaps that much more likely to extract/insert the pollinia key?

If anyone succeeds in hand pollination please post the details!

Thanks,

--Rick in CT

http://www.cactus-mall.com/stapeliad/pollin.html

Here is a link that might be useful: Stapeliad pollination explained