You receive a 15% override for all checking/OE events. The Line Checks can be done on days off(normal) which means you can make some good money but you sacrifice your off days.
No positive space but if you are conducting a checking event you can book a jumpseat 9 days ahead.
The Standards group is a great group of people, very professional. If you like to teach it's a great deal, if not, no pay is worth the extra work.