ogre thrower+troll

[Five Minute Lasters]

I have a burning question with which I hope you can help:
I'm playing goblins as my first team and want to make all different guys (I know, for you guys this is logical but as this is my first team and I never converted before this is actually a big challenge for me!). My goblins are turning out rather well, but the trolls are a different story: one troll is obviously ripper bolgrot, but I haven't found an apropriate model for my second oaf, i do got an idea though, this is it:
replace a trolls arm by the arm of an ogre thrower arm, this lets him throw a goblin too. If this looks normal then i'll have an easy made fun model, but only IF. I ask you: won't it look ridicoulis (an ogre has a fatter arm, but I can't try it out because I don't have a spare arm, maybe you guys don't even have to try for knowing, so i ask you...)