Hmm, well I think in creating a "Universal tank" using a Konigstiger turret on a Conqueror hull seems a little derpy IMO
. A "medium" would probably have a lighter main gun/turret/armor for enhanced speed and mobility, while the "heavy" variant would have a stronger weapon and can slug it out to an extent. Kind of like the Entwicklung series of tanks maybe?
I'd say some ideas could be:
1) Possibly use a centurion hull and use panzer turrets on them, such as the Schmalturm for a medium, then working your way up with larger turrets (since I see your tanks mostly are a mix of German and British)
2) Panzer hull with a British turret (maybe start with using one with a 17lber and then use different higher caliber guns?)
And maybe for some inspiration for frontal/rear mounted turrets look at these:
BUT, as for the drawings themselves and should you like to stick with them, the only thing I see are the shot traps at the turret ring towards the end of the turret. I'm definitely not trying to be super critical here, just trying to give you some ideas which I hope you can find helpful