Hi Zimzallabim,
I'm no expert but I have an opinion
I'd be inclined to remove one of the trunks as they split quite high up and use that to get movement and taper.
Here is an example of a tree with the trunks splitting higher up because keeping them is definately an option too
EXAMPLE.jpg
If you have a closer look at the photo's you posted and the one above, the branches don't exit the trunk horizontally. This is something that pop's up regularly in the "don't style a maple like a pine" type threads. Obviously it's up to you how you want your tree to look, I'm just saying it as horizontal goes against your examples. I read an interesting bonsai today article last night about styling for beginners. It said to remove anything that must go (bar branches, eye poking and multiples from the same spot) and utilise the rest. From there you can slowly whittle them out as the tree and your ability develops.
Cheers,
Nigel
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