Yeah 140kg is pretty big! Do you have that "tacky" stuff as well? That is surely the only way to shift such a beast.
Ordered some yesterday, doing it raw gives mental bruises on the inner forearm lol
I've used some before, its called tacky for a reason, might as well be using superglue!
the other thing is, stones get bigger the heavier they are. If you are a giant then getting your arms into a comfortable position is easy, when you are 5'9 like me though, short arms and fat belly restrict the distance around the stone that you place your arms lol
Something else for this weekend head down to B&Q and get 4 or 5 bags of sand and a load of tape to make some heavy sand bags