Morter issues

[UtahBeehiver]

Make smaller batches of home brew. I used a gallon bucket. How did you insulate the floor. I can't tell from the pic but it appears the floor and dome walls sit on the concrete hearth which will heat sink temp away into the hearth. The inverted v is starting to show up in the inside dome joints so a bevel will be required to reduce v. Hemi-archs are self supporting.

[Michelleski]

Just started my WFO, spent 2 days getting to this point (just the brick laying part) and have no finger tips left!!! My major issue is the mortar I'm using 3:1:1:1 mix but it keeps setting in the barrow so I have to keep adding water to make it usable!! Doesn't seem right any ideas would be greatly appreciated. Would also like opinion on outer arch, it finishes with a full brick so there is no keystone will this affect the strength of the arch??
Love this community I've learnt so much!!