I'd be happy with the 4.8 from one plant. Good job. I'm brand new to auto's though and am anxious to get a my first auto grow going (waiting on seeds). My thought is if you're happy with the yield then who cares? Some growers are concerned about the cost of electricity, nutrients, supplies, etc., breaking everything down to the lowest possible cost per ounce of yield. Others like me are not so concerned with the total cost, although, a budget is still a thing, rather I'm growing because I like it, and it's fun, and I really like it because my homegrown bud kicks my @$$ and I don't have to buy dispensary flower unless I just want to. So, to me the yield is a personal thing and a target to aim for on the next grow.