Anyway, am I right in thinking the approved technique for flyers of airliners is:
4 across on the inbound leg?
Nope, it sure as $hit isn't, you little rascal!
Apply 1 x drift inbound (when you think about it, you fly the heading which corresponds to the inbound track, so it's just like normal pilot navigation).
Because you fly the 2 turns at 25° AoB or Rate 1 (whichever needs less bank), no drift compensation is used during the minute-ish of each turn. So, to compensate, 3 x drift outbound is used, so that hopefully after turning back inbound you'll end up pretty well on the defining inbound course.
I used to hate this stuff!
At least TACAN holds are also defined by DME, so you don't have the added mental faff of the '4 minute hold' for which to try to compensate.....