Here's a message from a student and my response, hopefully helps some of your guys out!
Hi Andy, I really enjoy the lessons. I am still very much a beginner, still at the guitar tormenting stage. As I have hands very much modeled on bunches of bananas, I much prefer using power chords. However, I experience a lot of string screech, like something rubbing along a cheese grater. I have tried different strings and string lubrication to no avail. Reducing pressure before sliding does not improve things either. is it something you have come across and is there a solution? Kind regards, Graham Thomas
Thanks, it is very kind of you to reply. I think it is a bit of each. Strings, technique and over-analysing. I shall keep working at it.