Hi everyone,
Sorry that it has been so long since I put anything worthwhile up. I messed up several bits that I had spent ages making that I thought it was better to leave it for a while. As I said in the previous post, the arm works better but the hand is the same.
Still, I have been creeping into the shed and doing a bit now and then, and again when I cock it up. The power piston centre has had three attempts to put bushes in, each time it went wrong because of muscle spasms. Maybe there is something in using the self-acting bits on the Super 7...

Never mind, onward and upward...
I have completed the displacer cylinder, the displacer piston and the linkages. Actually, the displacer cylinder is also the mark III version...

The displacer piston:

The engine so far:

It all turns freely with no resistance...I did take a video on my phone camera but the picture is dreadful!
So here are pictures of the linkages with the displacer piston at top and bottom of travel (the power piston is set at 90 degrees which is why it looks a bit strange in relation:


At the moment I have to locate and bolt down the walking beam bracket, remake the crank (it doesn't sit perfectly square to the crankshaft), locate and bolt on the burner box and then make the water pump and pipe it all up. The power piston cylinder is still loose as I want to be able to get the swarf out when I drill into the water jacket.
It all needs tidying up when I have completed fabrication, so please forgive the state of bits.
I have promised to have it at Forncett Model Engineers Day on the first Sunday of October...it won't be finished but it will be something to look at...if anyone cares

Will keep you informed...
Incidently, I bit the bullet and got myself a Centec 2A vertical and horizontal milling machine. I got it cheap and had to rebuild it but it was worth it!

I just happened to have a Drummond stand doing nothing, so adjusted it to fit as the Centec didn't have a stand, and I wouldn't have had room for one anyway. The little shed is about full now!

It has made such a difference to the way that I machine parts but there was another learning curve!

Andy