Unable to combine Microfilament, Theta and Selenite

[KeepDistance]

Microfilament, Theta, and Selenite are the Hamidon, Hydra, and Titan origin enhancements (respectively) that boost end/fly/jump/run.

 

I'm unable to combine these. The HO is at 50, the other two at 48. I tried slotting the HO but am given no combine options. I also tried slotting the Titan-O and am similarly given no combine options.

 

I've done this before with Nucleolus (HO) and the Titan equivalent (I forget the name). I'm guessing this is somehow a specific oversight?

 

I was trying to boost the HO to 53 to sell, since the combined ones sell for such high prices.

[KeepDistance]

Ugh, nevermind. I'm so used to combining with catalysts and boosters that I expected the possible combos to show up in the upper left. I need to look in the enhancement tray itself for possible combos.