Scrapyard salvage of two British classics Help with tapers please!

[Turboconqueringmegaeagle]

i will have to find an operator's handbook, i cant believe that a lathe that is capable of having fresh material fed in through its chuck while still running should require secondary operation after indexing the turret, you would need to take your time to do it accurately and then it would be no quicker than a morse taper in an engine lathe. Ive been playing around with packing in between the locking bolt and take up wedge and am reasonably confident I will be able to re-re-manufacture the items i am currently blaming for the play
turret does have a t-bar that clamps the dust cover and locks the turret up
maybe the intention is that the whole thing is aligned using some ground round and the hole through the turret shaft if extra precision is required
but for normal duties the locking bolt and adjustment wedge should centre it without too much slop
i dont know how well these pics show it, but both of these items are home made, with metric BZP allthread, neither the bolt or the wedge are flat or smooth so the indexing mechanism can not overcome the binding when the wedge is tight enough to take all the slack up.