There is a slight difference in length between the cam bush fitted in the crankcase and the matching bush fitted in the innner timing cover. I don't have anything to hand, but believe the crankcase bush is the shorter one.
You can adjust end float for the cam by gently tapping the timing cover bush inwards until the cam rotates freely with minimal end float, if you overdo it just tap it back out and try again.
I never used a gasket between the inner timing cover and crankcase, just a thin layer of silicon gasket which was allowed to set fully before fitting the inner cover. I also put a bit thicker layer around the oil return pipe stub, in place of the additional paper gasket.
By leaving the gasket out, you need to check that the cam followers do not bind when everything is tightened fully. If there is any end play (put two adjacent fingers in the follower cups and try to move the followers from side to side), use a shim to minimize the play, but leave a bit of end float.