Are the instructions you have for the Precedent build the same as those that were posted by Canabus/Harry?
For those interested in the history of the Huntsman 31 kits: The original kit was by Modav and was designed in the early 1970s by the late Dave Milbourn and I think was the only one to have a plan and instruction booklet.
Modav became Precedent/Balsacraft and so the kits are exactly the same but I think the drawing was dropped and just a booklet provided.
The rights to manufacture were then bought by Anglia Model Centre and parts were modified to provide tabs etc. for ease of fitting parts together and just a build booklet was provided. They ceased trading a couple of years ago.
SLEC, who are descendants of Balsacraft, have designed and now produce a 47" (scale 1:8) version which is very similar to the Precedent but has some constructional changes and a laser etched ply deck. They also have a 1:16 version that was designed by Dave.
Chris (Fairey fanatic!)