I have attached a photo of my original pump and the new one supplied by
lancair. Would anyone care to comment as to which one they are using and as to
how the mounted it as it is much larger then my original pump?

Gerard,

 

The one on the picture's left is the second Lancair 200-300 series pump as the first on had a much smaller reservoir although the actual pump body was the same.  The third version (picture's right) must be for the IV series aircraft since the gear and flaps were hydraulic, along with an accumulator.

 

I hope someone can answer your question since Lancair factory youth, having never seen the 300 series Lancairs, cannot.