perhaps as future project we can remove the wooden ties and pour the floor in the old shop like we did in the new shop. this could even be done one bay at a time as funding allows. The joints between the sections of concrete could be done with expansion rubber. then we get our nice working surface, with sure footing and excelent durability. And if we do it one bay at a time we don't loose all of our storage/work space for a few months.