Not rare - 8/8a booked for Pulsars. Indeed, the breakdown sheet calls for NSA fitted examples (despite NSAs for the 8/8a not yet having been done) of which 1509 is.
(10 Feb 2016, 4:45 pm)Lee wrote 1416 on the X1, yet again.
That might be because 1594 was spotted at Bells in Spennymoor last week. Funny how 1590-2 haven't really played up yet but 1593/4 have been doing so since new