Hi Prop, Azonic and Rimrock have already answered your questions
What can I add but tell you that Frank is a great guy and his customer service is excellent.
I haven't used mine that much as other people have, but so far smooth sailing, no leaks or electronic problems. If I would build it again I would be a tad more careful in cutting out the windows of the cab and try to get some decent paint instead of the stuff they sell here.
He now also has the 490-11 which is the same machine but has a different higher hood on it.
For what he charges, it is most definitely value for the money!
I sourced the recommended ECS and Servos myself but in afterthought it would have been cheaper/easier to have Frank take care of that.
I use my ScaleART radio with it.
Hope this helps you make up your mind.