Component-dependant engines

[Raapys]

I've introduced power reactors to the game, basically just a generic component, and I'm trying to get the engines dependant on it being present for them to work. Since it's not possible to add new 'abilities' from what I could find out, that means I had to use the Get_Design_Specific_Component_Count() function. I first tried putting it in the 'to use' requirement field of the engine without any luck, then I tried using it in the 'movement amount' formula on the engines( i.e. tried setting movement point amount to 0 if no reactor present).

There's simply no way this will work. My two test designs, one with reactor another without, always fly at the same speed. I tried getting a little creative after a while, but alas, reactor or not, it doesn't make any difference between the two ships' speeds. They both fly either 1-2 m/s, or 10 m/s, dependant on how I set up the formula, while I basically want the one with the reactor to fly 10 m/s and the one without to fly 1 m/s( or 0 m/s, but that doesn't seem to be possible).

If it wasn't for my very limited capabilities, I'd say the function didn't work properly making it unable to find the reactor component.

Any ideas?