I did mine with Steve Burton when he was at Meramid's then went on to set my own facilities up on my boat and dive centre.
Since then I've taught hundreds to instructor level, Eanx and Tmx
A couple of points
1/ it's all physics, organisations can't affect that
2/ each facility has different logistics, set up but reaches the same goal. What you learn specifically in one centre may not work in another, so it's concepts you need to master and then transfer them to your own blending facility and keep yourself safe
3/ Partial Pressure Blending is soooo old, I teach continuous flow eanx and trimix too, it really is the way forward, not sure anyone has bothered with it in Pattaya, too busy on the forums, maybe?
I would try Steve B, if he's still teaching in his new workshop or Roger Aquanauts, but you need to have an open mind, pay the right money, and be clever!
Firstly