Built the base with the up-ended blocks and installed the lintels. A bit of block cutting with the angle grinder needed here for the ones supporting the lintels.
Moved the base into position.
Now all that's needed is to move that hemisphere on top of the base.
Get it closer on rollers.
Then up it goes on a pile of blocks...
...and more blocks.
Then tilt it over onto the base.
Put the rollers back under it.
Roll it into place.
Layed a bed of mortar for the firebricks.
Mortar going off too quickly in the warm sun.
A pillar to support the two front parts.
Fireclay fillet between the components then move them all together.