Dynex tension and Loos gauge

[Troppo]

Fractional inline double spreader rig (9.4m), cap and mid shrouds inline, lowers aft (keeps the rig in when the runners are clipped forward for cruising), running backstays for serious playtime and standing backstay.

Recently had the whole rig out and done the full nine yards, everything new again right down to last monel rivet.

The running backstays and standing backstay are now 4mm dynex. I'm using a Loos gauge to measure the tension of the SS rigging for the initial set-up, but it seems to seriously under-estimate the tension for dynex, maybe not such a surprise.

So how do you measure the tension of dynex either using a Loos gauge or any other way?

Cheers all