Thanks guys!

So i am vac'ing/leak testing/recharging a forum members 134a system tomorrow with my new gear.

Its going to be in 40's tomorrow here. How the heck will i know if anything is working right, other than gauge readings? Do I blow hairdryers into the air intakes ??

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car