All a bit esoteric (unless, of course, you are being 'trapped'
) but I thought the idea was to fly outbound the
equivalent of 1 minute's groundspeed to try to get the inbound leg as close to1 min as you can - hence the '1 sec per knot' I have always used. Like mw10 I would bow to the 'training captain' of course for the 'test', but I reckon the OP was right at 23D (
Edit to add: Depending on wind). Take it to its illogical conclusion and fly out to 25D at 120kts with a 60kt headwind and see how long the whole '4 minute hold' takes!
BTW, I thought the examiners always treated the 'first' hold as a 'freebie' and expected a sensible correction on the next?