Great work with those figure modifications! They look fantastic.
When it comes to figure modifications, because plastic is an easier material to work with than metal, we sometimes get a lot more options with plastic then we can ever get with metal. That being said, it also depends on the plastic figure boxed set because a bad set is still a bad set.
There are a several reasons why I prefer plastic figures over metal. One of them is variety. With metal figures, you are pretty much stuck with whatever poses the sculptor created, but depending on the the plastic figures, sometimes its very easy to make figure modifications. Especially if the plastic figures have separate arms.
With plastic figures these modifications can be extensive, but they can also be simple and easy. Below is an example of a simple modification. All I did here to make this 28mm US Airborne medic was to add a left arm from the Fallschirmjäger plastic box set. That's it. Note that the cuffs for both arms are the same, so it looks like the part came from the US Airborne plastic set instead of the Fallschirmjäger plastic set.
For this next figure I had to do a little bit more work with some cutting and trimming. To make this 28mm US Airborne I used the grenade throwing arm (part 26) from the US Infantry plastic box set plus parts 19 and 30 from the US Airborne plastic box set. The only bit I wanted from part 19 was the M1 rifle, so I carefully cut it away from the hand and cleaned it up so you could not tell there was a hand on the stock. I then glued the M1 rifle to part 30. This sounds like a lot of work, but actually it was pretty easy. Power to the plastic
The one aspect about plastic figures that some people might not like is the extra time they require to get them ready for the game table. Unlike most metal figures, with plastic figures you first have to remove them from package, sort out all the bits, look at the instructions/parts and decide on how to assemble them, cut out the bits, clean up the bits, and then glue all the little bits together. After the fgures are all assembled, now you are ready to start painting them. Overall, plastic figures take more time to complete than metal figures. With metal figures, you just remove them from package, clean them up, and start painting.