Opinion Please

I have two six inch Mesquite disks that I want to make into a clock. The blanks are about ready to work on but during the drying process they have gotten cracks.

The opinion I seek is how to best address the cracks. Should I drill them out and plug them, fill them with exoxy, do nothing or what do you think I should do to address the cracks.

The wood is now at about 12% moisture. My intention is to route out the back side in the shape of the clock body, drill through a 5/16" hole and mount the battery operated clock. I have some stick on roman numerals for the front side.

Currently the blanks are 2" thick and 1" thick. The two faces of each blank are parallel to each other and sanded to 60 grit in preparation to go to probably 320 grit for finishing. I plan on spraying polyurethane to help retain the bark. I will use one or maybe both to make a clock.

Let me know your opinion on what to do about the cracks.

This is a round cut from a limb. The tree was over 100 years old and was about 28" at the base. Most Mesquite trees never get this big and the person that let me cut it down after it blew over is who I am making the clock for. The rest of the tree is currently stickered and drying on my shop covered front porch. I milled the tree into about 2.5" slabs with a Wood Mizer mill. Cant wait to get to the big slabs to make turnings and jewelry boxes and so on.

Thanks in advance.