"Experience tends to be the key factor here...a repairer will be able to feel whether the roller is going to move, and either carry on or stop and treat with more freeing agent."
And the inexperienced, with a less-than-ideal screw driver, is highly likely to wreck the head of the screw before succeeding. That makes it a much more difficult follow-up job for the experienced.
And the inexperienced, with a less-than-ideal screw driver, is highly likely to wreck the head of the screw before succeeding. That makes it a much more difficult follow-up job for the experienced.
