Thanks for all the replies
I will try with the 18 initial and 38 total timing and also without vacuum and connecting it to the ported nipple.
No idea what is the issue with slots exposure.I try to check it again with a good gauge set,but the difference is visible.

There is a thing that i don,t understand:
Once that you have adjusted the T-slots exposure, Can,t you touch the RPM screw anymore?
what about if you need more Rpms to keep the idle ?you are going to loss the slots adjustment again.
The same for the ported vacuum cicuit,because the hole is going to be exposed under the blade and is going to turn into a vacuum manifold port