Oh dear, that's disappointing. Even worse they seem to be going downhill. I bought my kit around 15 years ago, when the engine first came out. There were drawings and parts missing. My main body casting was wonky. After a lot of aggro the owner realised I wasn't going to go away and gave me a new one. It's been quite a while since I worked on it, but I recall the main casting and crankshaft bearing caps were too narrow, I altered the design to take account of this. I eventually got the flame cut conrod supposedly included. It was too thin to machine to thickness so I binned it and used some hot rolled steel instead.
I used the main casting, bearing caps, cylinder block, cylinder head and flywheels, although the flywheels are undersize as one casting had quite a deep blowhole. I binned the small light alloy castings.
I suppose it depends upon whether you are willing, and able, to make the changes needed. Clearly working engines have been built from the kits but it's a shame it isn't a straightforward build.
Personally I wouldn't deal witrh the company ever again. The kit was disappointing and worse the owner was rude and agressive at times.
Andrew