low brake pedal

Brakes were fine until changing the hose

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Is that true? or do you mean "fine until changing the hose" AND "check adjustment on all 4 wheels"?
Forget the drag method . Make sure the parking brake is fully released.Fully released.
Crank them all tight until resistance is felt at the adjuster, then hit the pedal to center everything up. Then adjust some more until you again feel resistance. Repeat all 4 corners. Now check pedal feel. IT should get hard, and almost right away.If not hard look for air.After the pedal is hard;
back off each corner 3 clicks, and recenter the shoes with a pedal application. Then check for drag at each corner.Back off only the tight ones up to 3 more clicks. Recenter the shoes with a pedal application.Once more, loosen only the remaining ones if necessary, up to 3 more clicks. 6 clicks from tight should be loose enough.But let common sense be your guide.If you have to go much looser than that on a particular corner, you may have a mechanical issue.
Road test it.
And finally, adjust the parking brake.

I wouldn't rely on the measuring method. You may get precise measurements, But the reality is that the star-adjusters still have final say on things.Leave the wheels on and use them for leverage.Don't try it with loose drums. The drums have to be tight to the flanges. On the fronts, the wheel bearings should be adjusted first. The rear wheel bearings, if still the tapered type, should also be adjusted first. If Greens,there should be Zero play in the up/down direction.A bent drum, or an oval drum, or a drum not seated on it's flange, will give false readings