I've just done some work on the two gearshafts - fitted two new end needle roller bearings plus the locating studs and half circlip washer that retain the big ball bearings.
Also replaced the thrust washers (3). Tbh it has not really made much difference to the end float on either shaft.
Most worthwhile part of splitting the case down again is replacing the primary drive shaft bearings.
I have a spare set of gears in a spare crankcase set that seemed pretty tight until I cleaned them up with some petrol etc and they are pretty much the same as regards end float / side movement so I'm putting it down to the nature of the bike at present.
BiL is going to take a look as he is an experienced rebuilder of Japanese & Italian bikes though not of Hondas oddly enough he likes his Yamahas.
Currently in PAUSE MODE on assembling the crankcase so will do some more frame work.