By the power of Ribnet I received a LVM pump in the post today that hadn't ever been used for a very good price.
Many thanks Millermob
I connected it up to the Smaller Nashers 2.8M SIB with Airdeck, and was amazed to have it up to pressure in both main tubes, and the airdeck, within 1 minute. It usually takes at least 10mins of pumping with the footpump to get it to that stage.
It will be great running of the RIB batteries when we get to the beach as pumping the SIB up with the footpump has always been very awkward as well as hard work due to it being drapped over the RIB tubes.
And to make it even better, I used the pump to suck the air out of the SIB afterwards, and for the first time ever managed to get it back in its bag easily and with no help.
Having read Blacks comment I was surprised to read in the instructions that the vehicle engine should NOT be run whilst the pump was in use, as giving it more than 12V could damage it.
It ran perfectly off my Shogun's battery without the engine running, and made the same noise when I tried it on one of the boat batteries later.
Well pleased with my new toy