Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Well, here we go again.
Why can't things be simple and work as they should...

Well, it is sort of ok.  I sealed up the valve chest with
the same sealer your grandpa would have used,
Indian Head Gasket Shellac.  I even spoke with
a tech rep and he thought it was a good idea.  I've
added before/after photos.

I hooked it up to my usual air source and it just
would not go.  I then took it out to my garage
compressor and it took off - but at a much higher
pressure(?) than need be.  There are no leaks and
it turns over reasonably well by hand, so I think it
might have to do with the valve and ports.  They
looked a bit hinky to me and I was sorely tempted
to do a bit of grinding work to make them right
but thought I should give it a chance as it was. So... 
IT DOES (slowly) RUN!

Where do I go from here?
Wayne