Regarding the repeated movement of the oil pressure line bear in mind that the line is plumbed through the center of the head stock as Benny correctly stated. Very little lateral movement occurs when turning. The line is braided stainless steel and covered in a vinyl sleeve. Exactly like the brake lines that carry much more pressure. I believe the front and rear brake lines must flex and travel more distace due to their respective mounting locations than the oil pressure line does. Just mo.
