tug build
Not built this particular model but have built Eldergarth and Lady Jan.
The kits are real builders models and the buy as you build avoids a high initial cost.
The plans are not exactly to correct dimensions and you do need to perhaps take lots of measurements and use card templates to test fit the superstructure before cutting any wood.
I like scratch building so this was OK for me. I do believe this is common with many plans and even my Titanic plans which cost a fortune had mistakes.
Providing you proceed slowly, test rig the deck and superstructure and correct both so they match you will be able to make a detailed model that you can truly claim as yours.
How about a Build Blog so we can see how you progress and offer help and guidance?
Live long and prosper
Dave