With a "s" the 5p trick will work.
If you read further down the link I posted..... this might be worth playing around with....
You can of course at you own risk remove the tab before fitting the spear back into the keg.glad i could help and here's a bit extra (not sure if you forgot)
some of the A types have a locking system on the spear that stops you just using the punch and turning them out (after de-gasing)
you will get them "loose" but they will still be locked and wont lift out as there is a little metal tab annoying you...
after you release the gas use some multigrinps to grab the metal spear in the middle of the rubber ring
lift "up" on the spear and turn about 15 deg (not sure which way but i think clockwise to trick you...) to unlock
and let it go
the spear then will "drop in" to the keg
you then take your punch and use it to un screw it.
if the top does not have the little "punch hole" grab a grinder and cut a little slot in the rim to allow you to use a punch




Have fun & enjoy brewing.....