CUSTOMISING FIGURES?

So, I've got a fair few figures from the old Super Battle Collection now and it's just struck me that there's no post Android gi Goku (with the lack of symbols and sash rather than a belt), only Saiyan and Freeza saga Gokus.

I was thinking of making a custom one by taking an Ultimate Gohan figure:



And combinging it with a normal SS Goku figure:



To make something like this (this is a figure I saw on eBay which the seller wanted $300 for bidding to $600 for a Buy It Now)


Problem is, I have no idea how to go about this. I know there are entire communities hidden somewhere on the net that do this kind of thing but I can't find anywhere that's still active.

I assume I'd just cut the head off of Goku and Gohan and hot glue Goku's head to Gohan's body, but I wanted to see if anyone here had soem tips before I potentially ruin two perfectly good figures.

Alright, so this afternoon I got a little bored and I took my spare SBC SS Goku and my spare SBC Piccolo, a cutting knife and a mini hacksaw. This would be the reults...

Aftermath:


Front:


Back:


Wearing my other Goku's top (hence the symbols, if anyoen has a spare SBC SS Goku top they wanna send me, please shoot me a PM):


Overall, I don't think it went badly for a first attmept, but it certainly didn't go as well as I'd hoped. I thought it'd look a lot neater. Maybe next time, eh?