Newbie with twin axle levelling issues

I know we're getting a bit off topic - but when I was doing my engineering degree at the Royal Naval Engineering College in Plymouth, 50 years ago - one of our exercises was to make a small vice, which took you through every single engineering practice - cutting a perfectly flat surface with a chisel - lathe work  - thread cutting - case-hardening - milling, etc etc. 

It was very satisfying and I still have that vice in regular use in my home workshop - one of my treasured possessions!

Not quite that long ago but I started my apprenticeship not far away at Fisgard, Torpoint. 

Made the same at an engineering firm in warrington. Think it was part of the City and Guilds program used at the time. Standard across the UK. On the levelling of a twin axle I use the Alko on the front and a Nemisis Ultra on the rear and very easy to do and the insurance accepts this.

Sadly, Manadon, has now long gone - turned it into a bloomin' housing estate - criminal!

The houses are criminal, too 😕

Thanks - they arrived today. I already have a battery powered car pump (also acts as a jump start) but appreciate the tip. Bought some 6 mm rubber matting as well to protect them from the ground. How accurate do you need to be in lining it up between the yellow lines? Can see me being 5mm out and then having to re-position the caravan. Also the instructions say lower the steadies 'firmly' - what exactly does that mean? I was thinking of getting the steadies down and then two full rotations - does that sound about right or do you have another indicator?

Thanks again

 The yellow lines are a recent addition - my original one didn't have them, so I wouldn't worry too much.  As long as the wheel is near the middle of the airbag - and isn't trying to roll off one end, you should be OK.

Again, the instruction about the steadies, seems to be new.  I just wind them down as normal - whatever that is - and don't worry about it.

The one other tip I would give you is to make sure that the transfer valve is closed after you have finished levelling the van.  That way, in the unlikely event of a puncture, at least one half of the bag will stay inflated (assuming both aren't punctured!), thereby avoiding any pressure on the steadies. The difficulty is that, if you have an awning up and wheel cover on, you are unlikely to notice there is a problem until you come to take the awning down.

This is what happened to me, earlier this year - but it was after almost five years constant use. ( I use the L 'n L all the time when the van is stored at home - but not inflated). Derek told me that after that length of time, they had experienced one or two examples of the air bag material delaminating, causing it to loose air.  As I said, it went back to them and was refurbished for not a lot of money compared to the cost of a new one, so I was pleased with the way they look after their customers.