Thanks for the tips everyone. I think Downunder explained it well - that is how I reassembled my engine.

With regards to the alignment pin (nside the groove) and ring split being aligned or else you wont get the piston in the liner - I don't think that was the case with my engine. The pin in the groove was really small and maybe my ring had a little wear. I was really worried that maybe the ring had become misalligned with the pin (since you can't see it after the piston is in the liner). But I have fired up the engine after reassembly and it did not self destruct! I wonder how long it would take the ring to rotate though during a run, though.