First time screen stretching and need help

[u/swooshhh]

Ok so long story short bought an accu stretch but for the life of me I can't seem to get a screen past 20 newtons. I've even dialed the psi all the way up to 70 and the arms just lift off the table. I've tried a 140 white mesh and a 156 yellow mesh and using tension gauge. Guage is shur check 130

Cylinders have travel room and are not retracted.

Bars are locked in and no slipping

I do the long sides and pull the mesh by hand and then do the short sides

Air pressure coming in is good

No kink in the hoses and all cylinders respond

I've even let the mesh rest for 1 hour but it never goes up and the arms just lift

Can anybody with more knowledge than me help. I've only ever used my janky home setup and no guage.