Just noticed you have a Clubmax laser. That should be entirely diode and so shouldn't suffer modulation issues. I don't have a Clubmax but I'm sure someone on here will and be able to confirm if they behave in a linear manner.
I have a spectrum and it's part diode, DPSS. I have mine set to linear modulation. I did notice some improvement in some colours when set to log but it totally messed others up so be careful which one you choose. Pity manufacturers don't provide modulation information with the laser as it would make connecting the laser much easier.
You're profile doesn't say where you are from. However, another person to contact might be Martin from Syncrovision.uk. He's the UK main dealer for Kvant and used to be a member on here. I'm sure he can talk through you through what you should and should not be seeing when modulating and the settings via email or skype even if not in the uk.