[QtDragon] Beginner Questions

Hi,

I am considering changing from ProbeBasic to QtDragon.
While setting up my newest machine I started with ProbeBasic but I needed to update vom LinuxCNC 2.8 to 2.9 t get some new features.
I usually modify modify my VCP quite a bit to fit my machines. But with ProbeBasic I always ran into trouble to bring this changes to a newer version. 
So here are my questions:
I can develop my one tab in QT Designer in embed it into QT Dragon without touching the main ui file, so when there is an update I don't lose my work? 
Are the Hal Widgets includes in QT Designer?
And not for my current machine, but maybe I swap my lathe later. Are the lathe Macros already implemented somehow? or easy to integrate?

Are there some best practices?
I Usually use the custom parts for monitoring the machines additional functions, like lube, spindle gears, hydraulic chuks, Column control and status IO's

Thanks Patrick
 

Yes qtdragon can embed panels in specific positons without modifying the main screen.
I would recommend building the panels in Qtvcp though.

Some of the qtdragon Sims have embedded panels as demonstration.. usually vismach graphics.