Don’t bother with rolling around underneath !! just use this hand brake just pick it up with your hand and wedge it under the wheel,
If all else fails a big lump hammer bigger the better usually works with copious amounts of swearing and not forgetting tea looking at the problem for one hour, that the process for all jobs.
We tried a lump hammer on an outboard motor the other night, I keep one in my toolkit so I can come out of the bus like Thor and solve problems with it . Didnt work though. I think there was a broken wire.
