I can't be certain but i think Darren Cotton (AVC) who used his WPS with an adaptor he made to fit in a glow plug hole.

Think it was on a Renault but he did mention it got very hot quick. The problem with the Ford diesel is the glow plugs tend to break in the head so that maybe puts paid to that idea.

Wouldn't a relative compression test against ckp vs cmp help determine a timing issue if a known good one was found but then i'm not sure how you'd determine a cylinder without a sync unless you have spare injector to fire off. (is that possible)

A reletive compression test still shows a peak of the compression stroke and i've seen scannerdanner on youtube testing petrol engine timing using

WPS in cylinder
or
Reletive compression test

all synched from an ignition coil primary signal or ign control module and to me both looked accurate but i'm no expert.

Being diesel i suppose its alot more difficult.

thanks
lee

p.s

edit

actually now i've read the post again i think its not a very good suggestion but i'll leave it up so you lot can have a laugh at my expense.