Trouble is Beags, (and I know as an ex IRE I'm about to utter heresy), there's a danger of turning things into art forms that are not worthy of the same.
For many of us now the now approved method of entering the hold, even with a CAA checker sat behind you in the sim, as well as your company's own approved examiner (as happened to me recently, deep joy) , is to select where you want to hold in the FMC, type the inbound Course and whether it's a left or right pattern in the box and execute........and in all honesty in the real world when the chips are down ( yes, even in the States
) as long as your join keeps you in the protected area they really don't care about how you do so.................
It may not help people pass the CPL IR and I know what has to be taught has to be taught, but ..............