In the vid, when i show the bag with the allen key in it, there is a small black ring. Its a spacer that is for certain pistols. All it does on my P90 is alter where the on/off switch ends up..
On the destruction manual it says not to use li-on, nicad or oxy?? batteries but i am running mine off energizer NiMH 1000ma.
Thanks for the + comments. Good to know after a couple of years i can still add something worthwhile.