There are a few things you could do to HBWR seeds to improve the experience and minimize the risk of nausea. Some are more involved than others.

1) Defat with naptha or some other nonpolar reagent (I've tried sunflower oil, with no luck, but other natural organic solvents might be useful).

2) Add ginger to your CWE

3) 3 datura seeds should be powerfully antiemetic, without being psychoactive.

4) Extract the LSA (I believe Kash has a TEK on the wiki)

5) Make a tincture you can absorb sub-lingually.

Blessings

~ND