Transmission woes...

[Talkwrench]

1. So I finally assembled the trans after smashing some teeth off the cluster, thought I'll get it right and also ordered a NOS second gear etc. So all 'seems' ok, been for a few runs. I thought to myself I have another case and about 80% of parts to build another "spare - ready to go" trans . I knew when I had the gear that the profile of it was slightly different [ see pic] but just thought it was a different manufacturer - updated perhaps. Well I had to do a reference in Macs book and theres a paragraph on the gear and its a later one and from what I read its not interchangeable as there a slight difference in angle, However there doesn't seem to be an issue , no noise, no difficulty getting in and out of gear, doesn't jump out. Anyone else done this?- do I worry ???

2. The pin on the shaft has been smashed- worn off, are these available and is there any tricks for removal and replace?

3. The Syncro hub I have slides on easy and there's the slightest of movement on the shaft, whats acceptable?