Joakim,
You'll like it. Tony did a 2.4 conversion on one of my Pro-Line single sticks about a year and a half ago. It still has a slightly twitchy elevator (figures) pot but it's hardly noticeable. Plus, since I have a problem with spending money on stuff I look at and go hhmmmmm.... I decided to try it on my own and converted my second Pro-Line to 2.4. Now I have two that work great and I can swap a 6m Rf deck back into either one if I wish to. Tony will probably use the XPS universal module which will mount on top of the Tx, if you ask him, I'm sure he can set it up inside (I'm assuming it's a two stick Tx). You might want to ask him to put a Deans or other type of plug between the battery and power switch (he forgot to do it on mine), I did so as not to have to cut and solder the wires when I have to replace the Tx battery. If you want the antenna and old Rf deck you might want to mention that too. By the way, the XPS universal module also works in my 78 and 79 Series Kraft single stick Tx's too. I've been using the XPS in my Tx's for about a year and a half now (no issues in my experiences). Post some pics when you get her back.
Mark