Printing at 260 deg and 110 bed is not very healthy for the printed, I ought to keep my prints bellow the 10 hrs mark.
Regarding the nozzle; I have a regular one (the original one), I have no problems at all.
I have successfully printed much bigger parts, just be sure to set your buildplate to 110, cooler than that and you will be constantly battling rafts peeling off the plate.
Water soluble filaments such as PVA, while conceptually appealing, can perform poorly in practice as the materials generally have very limited shelf life.
The material, by nature, absorbs large amounts of moisture from the atmosphere and quickly become unprintable.
I was just researching this material to print quad racing drone parts for it durability. Polymax-PLA have a high impact resistance because it can be deformed way more than regular PLA.
Just a final recomendation, dont let the PC filament too long inside of a heated extruder; when you preheat the chamber, heat just the plate. I always get concerned printing new material and clogging up my printer. I always get concerned printing new material and clogging up my printer.
Next will be smaller nozzle and eventually the Bondtech extruder.