Actually if you get the extended Malt pipe as well you can increase you mash volume as well. I recently mash 42lbs of grain in the extended malt pipe for the 65L brewzilla. The mash volume was about 20 gallons and the boil was about 16 gallons. I probably could have mashed closer to 46 to 48 lbs of grain in the extended malt pipe and boiler extension kit. The issue you might face is will 3500 watts be enough to boil vigorously the larger volume of wort.

Yes but you need to buy the extended malt pipe as well.

An straigth answer is No. Because you are limited by the “mash tune”. But if you decides not to use the mash tune but instead a “brew bag” YES this extension will help you to do larger batches

Yes it can but the mash pipe may be to small you need a bigger brew in a bag

I’ve been waiting 3 months for my system To arrive when it does I’ll be able to answer your question

Yes it can there is a larger malt pipe you will need to buy. I do 15 gallon all grain batches with it. I use a pulley system to lift it out though it is a lot of weight.

It does add about 6-7 liters to the volume however you will need to get a larger/taller malt pipe. This is available to buy but I don't know if it is an extensiuon or if you need to buy the taller malt pipe. Hope this helps.