DSF

They would be ideal for that Paul - the springs need changing on mine and there's 24 in total

lol! i need only two now. still in design process but i am very keen on doing it

Not sure if these are any good!

yeah. seen them but wonder if two will be strong enough to hold the screen up with ink and squeegee...? worth to have a go as is only about £8

I used to have them on my burger-van... they held the serving hatch open. When I sold it, I accidently forgot them in the sale and eventually used them to prop my sun lounger up because the ratchet mechanism got buggered and instead of throwing the lounger away, I made a wooden strut that housed the two arms and my weight counterbalanced the pressure in the arms and so I had a very relaxing sunbed!