[MadMax]

I forgot to say, I've never gotten a large tree from a sapling, is that possible? (as in 2 x 2 square trunk size)

I'll have a go at your method, thanks. (Although it assumes I have 4 saplings, which is the problem I have in the first place lol, can't get that many saplings!!!!)

EDIT: I went and watched the video again, now I understand how to grow the larger tree. Cheers.