[Mart]

Bob, you don't install the cluster after.

You half install it.

You place it in the case, ready to go but don't fit the shaft. You then get the other gears in place and finally lift the cluster and fit the shaft. You can put a length of wire around it to help you lift it when needed.

I've never used loose rollers (my trans are earlier) but you might be able to use a dummy shaft, slightly undersize and shorter than normal to hold all the bearings in place, and then push it out with the proper shaft.

Thanks for coming back with a dignified response.

Mart.

Edit: I just realised I'm talking top loaders, but I suppose it still holds true for a side loader. (not sure).