Chris,

been trying to reply all weekend but home pc refuses to connect, work pc is ok.....

If you are making this set-up without a mill then follow a few simple steps;

1; Bolt the 2 side plates together and drill the shaft holes together to ensure they line up.

2; Drill the bearing holes as near to finished size as you can so the reamer cuts dead size.

3; Fit the bearings with Loctite - I prefer 603 - but make sure none gets in the workings.

4: Use silver steel for the shafts and loctite again for your gears.

trev