Late Navigator Head Gasket choice

Hi all,
Having just picked up the beautifully +.020" thou rebored and honed barrels from Hamlins Engineering in Bridgewater for my post engine number 94573, non spiggotted barrels Navigator  I am now planning the top end rebuild.

I am wondering which head gasket to use because I have an original NOS composite Payen head gasket for the later engine and a modern solid copper gasket from the NOC shop which will of course need annealing before use.   Interestingly both are obviously designed for spiggotted heads so have quite a wide gap between the edge of the bore and the gasket as shown in the attached pictures.   You will also notice that the stud holes do not line up particularly well so will need gently opening up in places to fit without rucking up.   I have found this is a common problem with all Lightweight headgaskets over the years.

I have also attached a picture of a Jubilee headgasket which lines up rather better with the studs and has a much smaller gap between the edge of the barrel and gasket.

You will probably know that Electra head gaskets are unobtainable and the solution is to use Jubilee gaskets which fit nicely.   I have done this very successfully with my Electra with no sign of a blown head gasket and (touch wood!) no oil leaks round the push rod tunnels.   I have attached a picture of an original spec composite Jubilee head gasket lined up on my barrels to show the better fit.

I have to say I am not a fan of the solid copper gaskets and although I have used identical NOS late engine head gaskets with that wide gap in the past it has always required a lot of fettling to line up the studs.

I am very tempted to refit the heads using Jubilee head gaskets the same way that is successful on the Electra.   My first question is, has any one done this and if so was it a success?  

My second question is does the composite head gasket fit with the plain face down against the barrels and the 'folded over' face upwards against the heads.  

I have never found any reference to this in the original Norton instruction booklets, the Lightweight Compendium or the better Workshop Manuals.   I have always done it that way in the past but always wondered if it is correct!   Even the Payen instruction sheet (picture attached) doesn't give the answer!   

Looking forward to sage advice laced with tales of mechanical woe as always!  

Cheers Nick