Do I stay on the m74 up to the m8 or is the a702 ok fully loaded ?
Personal choice mate. I like the 702, but then again I like to change routes now and again. If you’re heading for central or south Edinburgh then the 702 makes sense. If your destination is further west ie Livingston then M74 and M8. You’re the captain of your ship, you decide.
Oh, the 702 is fine fully loaded.
Be mindful of the camera vans. It’s rich pickings for them on that route 
Remember, North of the border, it is 40 mph on singles unless you are on the A9
SWEDISH BLUE:
Remember, North of the border, it is 40 mph on singles unless you are on the A9
Officially that’s correct, unofficially, get the finger out or you’ll be holding EVERYBODY up[emoji106]
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Last 10 miles up to Edinburgh, good chance of seeing a camera van, an it’s 40 mph in Scotland for lgv, on 702.
Be aware.
This time of year you’re behind a campervan doing 30 so should be OK.
Don’t stress enjoy the scenery.
Never heard of a tipping point, collapse into the depths of hell.
Cause a load was late.
There’s a few I can suggest though.
Daf245:
Last 10 miles up to Edinburgh, good chance of seeing a camera van, an it’s 40 mph in Scotland for lgv, on 702.
Be aware.
This time of year you’re behind a campervan doing 30 so should be OK.
Don’t stress enjoy the scenery.
Never heard of a tipping point, collapse into the depths of hell.
Cause a load was late.
There’s a few I can suggest though.
The Grantham bard returns… 
Straight up , then stop & get a coffee or two