Well I got a chance the last week to start machining a new block for the valves, all went well and it looked good, see pics below.
I needed one of the valves in the centre as it was leaking quite badly, I had been watching eBay ever since I got the Chiron but have not seen any so decided just to bite the bullet and get a new one from Festo. Thats when the problems started, they could find no reference to the part number at all and they reckoned it must have been a special made for Chiron, they didnt have anything that was a direct replacement either and suggested I contact Chiron to see if they had one. I had already been in touch with Chiron regarding the spindle/drawbar/bellevilles and they had told me they had no spares at all for the machine as it was so old, they couldnt even help me out with a manual or any info about the machine, that was quite a surprise as I thought German Companies were supposed to be super eficient

Anyway that was a big problem and I had to think of something else. I could have chopped the block in two and removed the centre portion and got some other valves to do the job but I decided to just scrap the valves and go with others. I had previously purchased some SMC valves and manifolds from eBay but was a few short, I found some more on USA eBay so ordered them and they arrived on Friday.
I set to work welding up a plate to replace the original manifold and machined two blocks to hold the two big cassette valve and then screwed the SMC manifold to it. The SMC valves are 1/3 the size of the old Festo ones and have more flow.
I got things fitted yesterday and tested out and all is working well, today I finished off rewiring everything and tidying up the pipework a bit, still have a small leak from one of the cassette valves but it is minimal compared to all the leaks before and I can get a new cassette valve so no problems there

Previously the compressor had been cutting in every 5 minutes, now it is over an hour unless of course I am doing tool changes.
Very happy with the way things have gone

Hood