I am trying to rebuild this but am struggling.

1. Can anyone provide me with a link to an exploded parts manual?
2. I pretty sure that the piston to sleeve clearances are poor, there is very little compression and no pinch when cold; I'm told should there be, is that right?
3. When cold, fuel bubbles out around the exhaust port when cranking by hand and it's easy to take it right over TDC with my finger on the flywheel. Are these signs of wear?
4. I can wobble the conrod slightly when I place it on the crank, is this worn too and if so, what can be done to fix it?
5. It runs at power but hates to idle; is this a sign of wear.
6. Where's the best place to buy spares?
7. Should I bother rebuilding, I don't mind the engineering but I also don't want to throw good money after bad.

Thanks