Enjoyed reading the drill saga - left spiral drills are for drilling holes to be tapped with left hand threads.
Friday, while following Mrs. A around "The Range " shop - spotted a set of very small right hand spiral drills at around £5.00,
from memory there were about 10 - with the largest 1.5 mm.
Next time we are at that shop I'll get more details.
Did not purchase since like Kevin I'm well stocked with drills.