Sirius problem

[Charles Lamont]

Over on the Model Engineer forum Jason and I are trying to sort out a problem someone has got themselves into over the Stuart Sirius's engines valve. I know there have been several shown on MEM. Would someone with the drawing(s) please answer a few questions? 

[redhouseluv]

I have the Sirius drawings, what are the questions?

[Jasonb]

Charles I have some of the drawings from Model Engineer mag but maybe Sanjay can help

Also see his Sun thread where we sorted that one out and the valve and ports are similar to the Sirius

I'll draw it in the morning

[Charles Lamont]

Thanks Sanjay. PM sent.