Hi Joe, Dimension drawings are on their way but as its a low priority (against building engines) its been very hard to find the time to get it done. That said I do have a master plan to make progress on it soon, I have not forgotten, its just I cant do it alone as I don't have all of the details in my hands.
As for new engines, there are many things I want to do but again its not entirely up to me. I can say however that our 30cc petrol prototype is running well and I am trying to sort out a new carb design so we can get it on sale