Having made a No8 I can confirm that the set is for this engine. Missing is the important connecting rod casting. These are available from Stuarts but are around
£12. The rod could be cut out of thick brass. Also there are no fixings and these are expensive at around £15 the set. They are all 5BA and 7BA and taps and dies could be obtained from Tracy Tools for less and would be re-usable, if you do not have them available. I could email you copies of the plans but I do not know how. These are normally over £10 the set. You can download the castings, materials and fixings list from the Stuart website. Harold Hall's instructions for the 10V engines are excellent. Google Harold Hall and you should get there. I think that with this help you could tackle the engine as a first attempt, as most of the setting up is very well covered. This sort of help was unavailable to beginners in the past. You could fabricate the box bed from wood if necessary - costing nothing.