Whilst procrastinating over finishing the Drone Base Vehicle, I have been rolling over 3 Real world shelf models which were close but not quite done over the Christmas period.
One is a Sherman M4 (105mm) and this is awaiting different tracks, as I plan to do a British Sherman 1B version. The turret was off and to paraphrase Billy Connelly..Wait a mannet ! What does it look look on the M10 hull I have stashed away with no turret (used on another project).
It looks like this. Not too unruly for my eye.

So what if, during the Russian continuation of WW2 after attacking the exhausted Allies through Germany, vehicles were re-used with different components (Straight out of Colin Gee's Red Gambit books)
So, maybe there are Achilles and M10 hulls that are refitted using 105mm Sherman Turrets, to give a fully armoured Closed top Support Gun vehicle. I figure if the 17 pounder fits an M10 and the Sherman.. then why not the other way using the 105mm ? Adapt a turret to fit. In RW there was some initial work for for a Turret for the M10 chassis with a bigger gun than the 3Inch, maybe the M36 Jackson killed that off.
Printed a Sherman Turret off Thingiverse. This is the test print, the final version was a bit more modifed by removing the hatches that were pretty much going to get trashed anyway during the cleanup process.

Starting to get the vision I see in my head happening in Plastic. Mantlet is test fit at the moment, will probably go a heavier type.

Details added to the Turret


Sort of looks a bit RAM ish. Maybe it could be Canadian, if British floats the boat.. I reckon I will call it the Curate, to stick with the ecclesiastica names for SP Guns.