Ko 2.4 conversion info needed

[andys]

I'm thinking of converting my Ko type R stick set to 2.4.
I know Horizon offered the service ages ago, was going to give them a bell and see if it's still available. I'm no stranger to the soldering iron though and would prefer to save cash and do it myself. Anyone know which spectrum module I need and where I can get it ?

Am I right in thinking this will be the cheapest option going forwards as I need a few receivers and I've seen the Ko / Futaba ones are silly expensive, the spectrum ones seem like sensible money ?

Cheers for any advice, I know nowt about this 2.4 lark.