First edition Space Hulk game with new player as marines.
Some notes after the game (Genestealer victory)

I confirmed you cannot jam unless you're in overwatch, I may have made marines jam once in normal move and fire

Max range flamer is 12. Bolter is unlimited but in overwatch it's also 12.

Overwatch fire does NOT get sustained fire bonus so we did that wrong

also if marine is attacked in close combat he loses overwatch

blips can only be voluntarily converted if they have performed no actions that turn. ie: blips cant move and then convert out of sight. A blip cannot move into a marine's LOS (and be converted) it has to convert first. If a blip is involuntarily converted (say, by an action with CP in the Stealers turn) then the Marine player places the stealers but Stealer player chooses facing.

voluntary conversion - Stealer player cannot put stealers in LOS and must place on the space where the blip was and adjoining open spaces. This means that might be cases where he can't place a converted stealer and if so, it is lost.