Before they've always been 10 - but the new HQ can house a few more so you should be good. I'm always up for another tech course if you're short on numbers.
Normally specific to one marker, so will probably be mainly based around the EGO11, but Robert will normally do a run through of the GEO2 as well. Either way, you will be able to apply what you learn to all EGOs/GEOs