Mk I to Mk II boom relocation

Question: ...regarding the conversion of the kicker
"Measure from the foot of the mast and mark with pencil the following position - 420mm. This will be the centre position of the repositioned gooseneck. " the measurement from the end of the mast including the stepped portion i.e.. the very extremity of the mast or from the shoulder part, if that makes sense?
Answer: ...from end of the mast ignoring the 'plug' which slots into the deck fitting - hope this helps. (ie from 'shoulder')
Will it be ready for the Nationals next month ?
We're making it a 'first nationals friendly' event for all so do come along. Accommodation list is on the website if you need it and its a great place to sail and combine with a long weekend break.
Regards - Mike Lyons