"2nm max from the runway numbers, which I regard as close enough"
I understand that you fly something "executive" with an N reg. Tell me honestly, (assuming that it is a single) if the donk failed 2miles out and you were at 1,000' and you had 10kts straight down the runway, could you make it to the threshold?
I don't know the answer in your mount but in my regular steed, I'd convert anything above 100mph into height, trim for the ton and expect to be seeing grass flying up from the wheels within a mile.
As mine glides like the proverbial flat-iron, I do try and keep any circuits very tight with bags of energy (speed/height) that I can dissapate at will.
Stik