Update it's been a long time since the original post so I thought I would update what I did after removing the cam carrier and with all valves closed, the pressure test was not conclusive in that it passed the initial test on all cylinders but failed a repeat test, I suspected that the pressure tester was faulty. I tested it in a closed circuit and it leaked I assumed that the original test was OK and that the second failed test was due to breakdown of the of the tester.
Having taken off the cam carrier the problem was cam timing setup so purchased a gig but it was impossible to accurately set them up with this bit of kit after a long process the suppliers gave me a refund after sending the unit back.
What I did to time the cams:- I used the cam carrier one cam has a horizontal slot in it so I used small bit of steel and a feeler gauge to get the cam perfectly horizontal in the cam carrier I then offered up the second cam to the carrier using a long socket on a flat surface of that cam to set the indents in that cam in the complete vertical position then checking the other cam with the long socket.
Having setup the cams i now fabricated a holder or cam clamp very simple two pieces of wood with four holes in each piece setting the strips of wood so they would not inter fear with the installation I passed two medium cable ties through each piece of wood so that they secured the cams to the the carrier (My Cam Holder Gig).
It worked flawlessly.
My TT back on the road and running well.