Zooma I get enough "signs" in my life and have learned to shut my eyes!!

As to supported air pistol in Germany it is very popular and is simple. The "rest" is a "T" shape like the top of an old shovel and the rest is round possibly 25 - 30mm in dia. This T is adjustable for height and the T faces across the shooting lane, the athlete's stance is 90 degrees to the lane. In Germany the pistols are brought up to maximum weight and the triggers are lighter. The heel of the grip rests on the round T and you use the pistol in the normal way, the more stable the rest is the better and I've seen them for sale on German websites. As Zooma says there is at least one grip maker making special grips for the discipline, this amounts to a different palm shelf. There is quite a nice four page explanation of supported pistol shooting in the MEC pistol Olympic Sports shooting book, showing the different rests for table top and floor standing.