Mr H - I cannot remember you asking for help. I have certainly not been asked for any prop offset etc. and I could not provide exact advice for this hull as I have never built one. These are supplied as hull only for expert build but it sounds as if you are a complete beginner - in which case you should have asked advice before buying the hull.
The only hardware set that I have that will fit is the HOR micro set [url]http://www.astecmodels.co.uk/catalog/product_info.php?products_id=950
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These boats are so small that central is good enough. The rudder just needs to clear the prop - If you can get it on the RHS then great. I also do a more scaleish rudder here
http://www.astecmodels.co.uk/catalog/product_info.php?products_id=950You could also use a combination of the Etti wire drive and the above rudder. You will need a 1.2mm coupler for that.
http://www.astecmodels.co.uk/catalog/product_info.php?products_id=950 http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_90&products_id=564We can also supply a build service.............
Which of the above you choose depends on what you want to achieve from the boat, the HOR is more easily adjusted.