I say wood putty the cracked one and leave it.
Nice work Peter how do you chuck these up for turning? I aint got no fancy jaws so just wondering what you use?
You could totally do this with a faceplate and jam chuck. There is nothing on the lathe that you NEED a 4 jaw chuck for. It just makes it SOO much simpler.
To start. glue blank (2x2x8) to a waste block (3/4 x 4 or so)
Then screw the face plate to that.
Now rough it to a cylinder.
Mark and drill your two holes with a hand drill. I think mine are 1/2 and 1/8. Whatever looks right. (twist bit not brad point)
Then hollow it out down to the bottom hole you drilled. leaving 1/4 or so of wall. ( I hog it out with a large forstner in the tailstock then clean up with a scraper)
Next shape the outside and then part off the base from the rest of the blank.
Now with the stock you have left you will make a jam chuck to hold the base
True up the face with a scraper.
Then with your parting tool make a tenon (1/4 or so) to match the hollow in the base.
Stop frequently and check. The mating should be snug but not too tight.
Mount the base and turn the bottom. (light cuts!)
Now sand and finish. The base is done.
Now for the roof.
The tenon you turned will be part of the roof
Turn and shape the top and then part off.
Now make a jam chuck to hold the roof (if there is enough material. Other wise glue up another blank and waste block)
True up the face with a scraper.
turn a recess and mate the roof
Mount the roof and finish shaping the roof (light cuts!)
At this point I drill a 1/16 hole in the roof for the hanger (Jacobs chuck in the tailstock)
Now sand and finish. The roof is done.
Assemble with a little bit of glue.
Enjoy.